I bought one with intel i7-3620QM, it is a good laptop, and great IPS FHD display, but I'm very disappointed with sound quality. I had hp dv6 with Beats audio and it is much better and louder sound. and why noteboockcheck doesn't rate sound quality (??%) like other criteria.
In short: it's a good laptop for the money that has a fantastic, class-leading IPS screen (it is beautiful), and will play most of my games (RTS) at mid-high details often at 1080p resolution thanks to the powerful CPU which powers through anything I throw at it.
Build quality is good and solid (much better than my old Dell), speakers are "ok", battery life is distinclty average, and the keyboard is imo quite stiff and difficult to type on, requiring a lot of pressure for keypresses, which isn't ideal for lots of typing. However, stick in a full-size external keyboard (like you should whenever possible when typing a lot) and all those problems dissappear.
All in all though, it's a great deal, and you won't get better for the money. No laptops of this price range have such an amazing screen and good overall spec.
I have this one right now and truly this can be considered a multimedia laptop. True, that battery is not its cup of tea but the gaming capability of the unit can be put to the test. The nvidia gt640m can really deliver, playing batman arkham city, crysis 2 and 3, saints row, payday the heist, anno 2070, prototype 2 you name it. The optimus functionality is okay if for basic computing but gaming better use the ac. The specs of the unit is quite future proof so this is an investment for the next two years. Acer is quite moving up to the usability of its new multimedia units. My unit is i5-2450m 2.5ghz; gt 640m 2 gig dedicated vram; 15.6 hd lcd; 4gb ram and 750gb hd. Hooray for Acer!
now day all factory decrease the battery size . i prefer bigger battery pack rather always looking for AC socket. althought Ac adapter is 400g , the increase size battery pack also will add around 300g. but no wire is better user exprince. at least 5 hours for wifi is minimum for me