I only played a bit over 5 hours and I have to say, I love this game. At least now, after just 5 hours. I don't understand all the negativity I found in this thread by quickly browsing through it. If I'd have to judge the game without playing it, I would probably not touch it with a stick. So here's my opinion about my experience so far:
- the graphics are better than the trailers when you actually see it
- player movement, gunplay mechanics are done really great. Based on initially released gameplays (by Obsidian people!) it looked weird, but I love shooting each and every time. The enemies react properly and the sound is spot on. Not only is it dynamic, but also the gun shots from afar sound properly... far. The worst part of New Vegas is done amazingly well here
- the plot so far doesn't have anything substantial to offer yet, but the dialogs and terminals show great potential. I like how the dialog options properly refer to things I have already done. I can complete a quest without leaving the dialog, while I've seen it too many times in other games when I receive a new quest, which I already did, end the dialog and have to start it again to see the proper option to say "hey, dude, it's done already"
- the characters so far are very likable and are pretty well animated during dialogs, lip sync is pretty nice
- proves you don't need Bethesda's Gamebryo port, or "Creation Engine", to create a very similar type of game
The bad?
- too much ammo laying around, too many powerful weapons ready to be found right at the start
- stuttering a lot on my toaster with eGPU setup, but perfectly playable. Aside from stuttering, which looks like a typical bus speed limitation because the engine streams everything all the time, the game needs more than a dual core CPU, which is pretty much constantly at 100%
So, based on just a few hours of playing (I think I covered all areas on the first location), my hunger for a New Vegas-like game seems to be satisfied. Of course, it might become bad later on, but up to this point (I think I have one side quest left before I get the power cube, or however it's called), it is pretty great.
edit - just noticed I had an update for the game in Windows Store (I disabled automatic updates). Any ideas what it does?