Picked up Elex last night from CDKeys. I haven't had much chance to play beyond the first two hours, but here are my initial thoughts so far (keep in mind I'm playing on a i7 5820k processor with a GTX 980 Ti card and 32G RAM). I'm a couple weeks late, but for anyone still on the fence, perhaps this may convince you.
Firstly, the environment is gorgeous. Plant life seems to have taken hold of the starting area, but it's very colorful and vibrant. Graphically, the game is quite impressive. Off road paths seem very natural and fit within the game world. I feel as if I'm exploring the wilds that have been untouched by humanity for a long time.
Controls are very fluid and reactive to player input - there's very little (if any) input delay, which makes me feel I'm in control of my character. This is wonderful, a huge plus. The jetpack is fun and is very responsive.
Character animations are a bit stiff and don't appear natural, although this doesn't really bother me much and has already been mentioned by the community. I went in knowing what to expect, so that may have helped. However, the framerate is very smooth, and haven't encountered performance hindrances yet, which is a great sign.
I've heard combat to be a bit difficult for players, although I'm not having much trouble with it myself. I'm finding lots of potions but haven't felt the need to use them yet (I may ramp up the difficulty at some point, I'm playing on normal). The world is absolutely packed with miscellaneous goods and I can't help myself when the desire to explore suddenly emerges.
Beyond that, I haven't really had enough time to have a taste of what the game really has to offer, but initial impressions are good. Very good, in fact. I had a lot of fun within those first two hours, and at two points I lost track of time. Good? Bad? I think that's a good thing.
More to come soon (I'll have logged more time later in the afternoon today)!