Go ahead. Many others have already done so. I'm especially interested to know how good the frame rate is on the XB1 version.
X1 version looks and place very nicely. Haven't ran into any issues yet.
Based on 5 hours of play...no spoilers.
Visuals: I love the art style...the graphics look great, character models look great, especially the key characters. Most importantly, the world is vibrant and full of life. Really digging it.
Audio: Voice acting is top notch just like how it was for TW2. But the best part is the music...it's so fucking good. It goes so well with the whole dark fantasy setting. Haven't enjoyed music in an RPG this much since Xenoblade.
Story/Character: Can't say much since I haven't gotten into the main story yet, but I loved the beginning. I know the backstory and the lore of the Witcher universe so that helps me enjoy the game much more. Anyone who hasn't played any of the games should do themselves a favor and watch and read recaps of the characters and kingdoms.
Gameplay:
1) Combat. The Combat has much improved here from TW2. But at the same time, it's not as polished as a game like Bloodborne. I'm playing on the hardest difficulty and I can see myself improving after each fight. There are various enemies I've faced that I needed to kill using certain methods, which I found awesome.
2) Sidequests. Definitely not Dragon Age (I did enjoy DA:I but found most optional stuff quite boring). The Sidequest I just did in the first area was much better better than 99% of most open world games of recent memory. It had a unique back story to it that was actually interesting. Anyone who played TW2 knows how well CDPR handles their optional stuff...they do more than just collect this and that.
3) Exploration. Have I mentioned how beautiful this world is? Not only that, it's huge. Lots to explore and discover. I've only seen a tiny percent of what's out there. I already feel immersed.
4) Controls/Settings/Other. Controls feel nice...there was a slight learning curve but now I've got the hang of it. Settings are awesome...I've adjusted the HUD to remove some of the annoying things to let me play more "freely". I really like that these options are available. Lastly, performance has been good so far. Haven't seen any bugs or huge drops on the frame rate.
So far, I fucking love this game.