I paddled a Rev M in an eddy during a lunch break. It was fun, but I was way too big for it. A friend of mine is an amazing boater and he just got one last season. He said that it isn't as easy to blunt as the 420 if your technique is sloppy. But if you really dial in your skills, it performs better than a 420. He said that it was much faster on the wave and transferring from edge to edge. He likes it a lot. I'm not sure if this helps or not. Personally I'd like to check out the Biscuit by Liquid Logic. Anybody tried that one yet?
If NEZ hasn't broken the boat yet, it must be good. Manufactures should be sending NEZ boats to test. If it survives 6 months with him it should last us mortals 10 years.