I flew a Reflex (OPK) at the Elmhurst, IL 2nd annual kite festival in low, shifting, unstable wind. It does fly well out to the side of the wind window. It feels "spongy" and a bit slow to react, even slower than a Zen. The inputs for turns and spins require a bit earlier and longer timing, and it has a slight tendency to oversteer. It has slightly more wobble when tracking straight than a 1.5 Rev, I'm guessing because of the movement of the springs which create a "keeled" and then "not as keeled" effect as they move back and forth.
I won't make any judgement as far as liking or not liking it, but with 14 real revs and 14 home-made already in my bag, I was not enough impressed by it to add it to my line-up.