I'm not a fan of 3D in movies at all, but it was done really well here. I saw Ghost Rider 2 in 3D (not by choice) and it was awful - maybe a bit of extra depth to a few scenes, but virtually no difference to seeing it normally.
There was a huge difference in this, and it looked bloody spectacular while not constantly throwing things in your face. Just little things like ash floating around looked great, and the first warp effect was simply beautiful.
The only bit which bugged me was a bar scene where there were some really blurry objects at the 'front', which was distracting.
Kim: I'm detecting some weird technobabble.
Janeway: A possibly dangerous anomaly that we know nothing about?
Kim: Yeah. I suppose we should steer clear.
Janeway: Ha! Good one, Ensign. Take us in, Mr. Paris.