Sii, as you may have seen, there are many threads re the Flow bindings and some VERY animated debate over them! Not all good hype, though many of the naysayers never rode them or rode them once.
I will throw my 2 cents in because I am 2 weeks (3 riding days) into a new pair of Flow NXT-FSEs adn I love them. Comfort-wise, they are the most comfortable bindings I've ever used (been riding 25 years) and the ease of rear entry is an added bonus - no sitting on your ass to buckle in!
Not sure what kind of riding you do. I notice the Flows have great heel/toe response, but are a little "soft" tip to tail. As a mostly freeriding all mountain guy, that works for me, because they carve nicely. If you are doing lots of tricks, in the park, etc. they may not the best option, IMHO.
The Flows are light and very adjustable (a pro and/or a con, depending on whether you don't mind fiddling with them a bit to set them up). To give a balanced perspective, the only downside I've experienced so far is that i find the mini-ratchets not that great. Theoretically, you don't need to use them as much since you aren't buckling in all the time, but they still seem a little weak to me.