I bought this laptop (the version with 1050ti, 16GB RAM, 1TB + 256GB SSD HDD), and my only complaint was how seriously awful the screen is. I tried to let it slide, but I couldn't do it, it's the worst screen I've ever seen. Performance wise it is a very capable laptop, and can even run Witcher 3 on mostly high (only a couple options like Shadows need to be turned down to medium) settings at 60fps. Even on everything Ultra, it still runs 30+ without issue.
Fortunately, it is crazy easy to replace with a IPS replacement screen which you can buy on Amazon for ~$60 US (I'm in Canada, so it was $88 for me). Search reddit for 7567 replacement screen, and there's a bunch of people posting what screens they used, and videos on how to replace it (it's seriously very easy to replace).
My enjoyment with the laptop increased by a ton since getting the new screen. I would advise to anyone thinking about this laptop, unless you really want 4k, go with a lesser model, and buy a replacement screen, rather than buying the most expensive model from Dell. Outside some HDD options and more RAM, the screen is the only difference between the most expensive and cheapest model. Both the RAM and SSD'd can be installed/upgraded at a later date if you really want. Dell made the laptop very upgradeable in those regards.