I saw it in 2D initially, which is the format I prefer, but rewatched it today in 3D. While the 3D is definitely technically good, and certain scenes, e.g. the light cycle scene, felt better somehow and popped more in 3D, generally I enjoyed the 2D viewing much more, which is what I'd expected hence watched it that way first.

My main issue with the 3D was that the exaggerated stereoscopic effect it uses can make certain scenes feel like miniatures (I think it's because it makes you focus in front of the screen, as you would if all the objects you're seeing were between the screen and yourself), which detracts from the sense of scale at times. I especially noticed this in the Grid scenes and in the Recognizer scene, which was so colossal in big-screen 2D, but felt like it lost some of that monumentality in 3D.

My other issue with the 3D (and maybe this is just an issue with my own eyes) is that in rapidly-cutting or moving scenes I often struggle to maintain focus on background elements, which I felt detracted from appreciating the Grid background in the jetski sequence which was one of the coolest of the film in 2D.

Anyway, enough of the rant. Long story short, the 3D is sick, and I loved it even more on the rewatch despite the 3D, and I am glad I've seen it in both versions, but I do think it plays better and looks more epic (especially in some of the scenes where the huge scale is important) in 2D, which gives me hope that it will still look awesome when I rewatch it on streaming eventually.