These bindings are super high quality, and Flow has certainly made some improvements with the ratcheting system, and binding-entry. I previously had the 2008 NXT FSE, which I loved - perfect match for my 2008 Rome Agent (cambered). The NX2-RS a little heavier than the NXT FSE, and feel a lot stiffer.
I was using these bindings with my new Rome Agent Rocker, and it is too stiff for the board so I switched over to the Rome 390 Boss - a much better pairing. The weight difference is definitely noticeable.
Overall, these bindings provide great stability for bombing down the mountain, are fairly secure, and help dampen the chop. However, if you're looking for a playful setup (e.g. park riding, messing with feature, ground tricks), I do not recommend these.
Also, as someone else mentioned... you might want to consider a leash with Flows - I too had a wipe out, where the back caught the ground and unhooked the binding. Luckily for me only one foot came out, so I didn't loose my board, but the high back cracked - which put me in a position to replace the bindings.