I loved it. By far the best reverb they've released yet. It seems to me that Boss is making a solid effort (as many companies are) to do the Strymon 'thing' and this one does it best. I was on a reverb search recently and I tried most of the big name brand ones (Digitech Polara and their Supernatural ambient one, the older Boss pedals, and some Line 6 gear) and this one was by far the best. Good enough that I didn't even consider saving up another few weeks and getting a Strymon - It was certainly less configurable than the Big Sky and was missing a few of the niche sounds, but the sounds on the RV-6 are on par with it otherwise. 
Genuinely super impressed by this pedal. I think czarokrates might be thinking of a different/older model because this is a totally new breed from Boss.
I saw a good review of it on tonereport too: 
http://tonereport.com/reviews/boss-rv-6-reverb