Lenovo always cheaps out on some crucial part of these Y-series laptops.  We have a Y580, great screen, great gpu, great keyboard, horrible scratchpad, horrible battery life, no extra-cell battery is available.  It's always something. 

With this laptop, it's the screen.  The brightness of this screen is something you'd expect on a $200 laptop, not a $1200 laptop.  The brightness is good for usage in a closet, that's all.

Why can't they ever get it ALL perfect?   You'd think that with $1200 to work with, they could do things right ...

Almost all of these comments are rather irrelevant, the 198F temps will not be reached with normal use{Heavy Gaming} and over-clocked. {as said in the reviews}  my model has not only hit around 170F which is fine but has played every game i have thrown at it [Games played in ultra and 2k resolution.]  As for my screen, it did have a little blemish on the bottom left corner, However I have found that it will not effect the colors.  as for PWM dimming, id get get over it.  older monitors are the worst in regards to this area of spec.  you will have to spend lots of time every day to actually burn your eyes with more current screens/monitors, and as the tests that have been done.  Otherwise, it is also irrelevant because the refresh rates of todays monitors have improved.  Just like its irrelevant that cell phones & WIFI emit radiation, because it has been under standardized testing & development to lower the Radiation count.  Id have to say, the screen is rather too dim to go outside with it all. As said above.  At any rate, I have no complaints with the Y50-70, and my older Y510p-sli.  It is one of the fastest machines for the price.  Don't let all these negative trolls that didn't buy the product influence your purchase.  BTW removing the back cover dose not void the warranty, Lenovo has trust in the "end user" to do maintenance inside, so no you will not void a warranty removing the SSD/HDD, or ram ETC.  Always RTM {Read the Manual}.
Also, this site is a really great for a reference site, so stop trolling on it.  My Y50-70 is a non-touch, and i put in gskill ripjaws 16Gb 12000 ram and helped speed up things considerably in benchmark tests, the only defect on my Lenovo is the corner of my screen is a bit blemished but not visable with images on screen.  If you really had problems with your Lenovo, send it in to Lenovo trusted shop{not really}, then have them reference you to customer care, talk to crystal, she was actually VERY helpful in regards of replaceing my fried Y510p sli with the y50-70.  Honestly though i had to wait a month and a few days to get my replacement, and you also get a warranty with your replacement and can upgrade that warranty at any time[within 365~days].  As far as improvements, I would have to say the whole laptop is a great improvement from the predecessor Y510p-sli.  Im not saying that this laptop is the best in the world, ha!  Im just saying that it is actually a good moderate level laptop for gaming that happens to have high benchmarks in CPU/GPU [Not desktop good} but will play most newest games rather well if settings are correct. My added ram helped alot and the Samsung SSD is a nice SSD but not the best by all means.  It has its top reading around 500MB/s or ~8.44GB/Min however you will not see those high speeds often {because there is no reason for data to read and write that fast yet.}      P.S. Love the site.  It helps to reference what i am working on when repairing other laptops and information.  I can find out what component exactly is inside with most full reviews, and the statistics help referencing systems to other of same model conditions.  EQR

As usual notebookcheck REFUSES to post information on PWM dimming which is a major cause of eye strain. Pathetic..

     Whenever you buy a laptop whether from Dell, Lenovo, HP, or any company, first thng to do is always reinstall windows. Then install drivers. The drivers should be on the companies website or else they really don't have great support.
     As to warranty voiding on change hard drives, I think it does but who knows. I called Lenovo since I had a problem opening my case on the Y410p (Late 2013 model with geforce 755m, bought June 2014) since I wanted to replace the 1TB hdd with 256 Samsung  Evo 840 and they say why didn't I just customize it to SSD? LOL, cause its 200 bucks more -_- when I can just buy it for around 125USD, plus I would be keeping the 1TB hdd for free by then. And they said any damaing or tempering of the interior will void warranty. Yeah whatever, doesn't that mean any damage from outside may damage inside voids damage warranty? So what's the point of warranty?
   Well as an advise, always reinstall your windows that is if you have a separate copy not from the manufacture since those may contain bloatware too whenever you get a new laptop. Install drivers afterwards by downloading drivers from manufacture website. That way you get a nice clean laptop with windows without manufacture bloat ware and all that other junk.
    By the way, I did have a problem removing my dvd-drive to open the case(That is for the Y410p). So they offered for replacement. They should be able to offer a replacement rather than having you send it back and wait for it to come back. My replacement came before I had to return the one with a stuck dvd-drive.

Don't buy this laptop ,
I have seen many videos on youtube and checked many sites gives it high rates but after I bought this laptop I noticed that it is very slow compaired with my EX lap which was only core i5 from HP and only few days later the screen colors begin to damage and I noticed many prints on my screen ,
the customer service asked me to leave my laptop about 20 - 25 day to fix it and I'm still waiting for this problem to be solved ,
Don't believe the sites or the videos this is cheating...............
Lenovo put high specs with very low quality materials to overcome the price problem to be able to sell
advice .. Don't buy this laptop...

Good 4 players, gaming.
Here witcher  3 performance on this notebook :

https://www.youtube.com/watch?v=fDoGR7BJauY

have a nice day :)

I really don't recommend to buy this computer (i had it with 512 ssd), should have been great, however got it faulty 3 times (at the begining customer service in my local area were not proffessional. I sincerly adivse you not to purchase.

i totally dont understand how u reach these numbers for ratings ! you have written that cpu reaches 98 c under stress and also on the surface it reaches 53 (or maybe more? ) and with all these , you have given it 91% for temperature?
2 more degrees and your laptop will shut down in order not to burn!!

if this is logical, the other laptops that hardly reach 40 on the surface should be given 150% or like that!

Is there a reason the "Connectivity" is rated so low?  Lenovo's website lists AC Wireless 2x2 so I'm assuming there is dual-band.  Also, how easy is it to replace the hard drive and does it void any warranties?  Otherwise very interested to see this iteration of the Y50 for the mobility/temp/noise/price!