So I just got my E595 a coupe of days ago though in the 3500U version.
8GB RAM, RTL8822BE wifi card, 256GB SSD
I haven't owned a Thinkpad before but so far, it's proven to be better than I expected!
Some drawbacks which caught me offguard:
1. After using the laptop for a couple of hours and not noticing it, I then moved closer to the laptop and heard coil whine-like noises on the upper left part, not sure which component is producing it though. But when I added a 500GB HDD to it, it all suddenly stopped, no more coil-whine! I then tried to put the HDD into standby and suddenly the coil-whine noises came back again.
So my take: Apparently, the current or voltage balance on the board is off without an HDD attached. Even just putting the HDD into standby will make the noise come back - you need that extra drainer to balance it out.
2. The heat development near the hinges and backside where the CPU is located is quite significant, much more than my older laptop which got an Intel i7 and a dedicated GPU. It makes working in summer a bit more difficult.
3. The fan turns on more frequently the longer you work on the laptop since the heat builds up and cools down slowly. Heat dissappation of the E595 after shutdown is also a bit slower than what I experienced with other laptops.
4. I swapped out the RTL8822BE card with the Intel AC 9260 one. It was cheap and a lot of people complained about the Realtek card not working properly or being slow. Lenovo does whitelisting but the Intel one is compatible with the E595.