Guess I'll chime in here. We've had a couple days of rain since I did my wife's black MDX with NXT tech wax. The slickness is pretty much gone. So as far as the high hopes I had for slickness durability, I'm a little disappointed. I can't comment on shine or protective durability until I get a chance to wash it again. Paint's too dirty at this point to make a fair assessment.
But, still I was blown away after using it for the first time. It was so easy, and the shine and slickness (in my opinion) were as good, if not better, than Klasse twins after multiple coats of SG. On top of that, it has better depth than Klasse. This is truly the first wax I've tried that really blew me away (I've tried Klasse, Blitz, and S100 all of which are great). But to me, NXT leaves nothing to be desired. No smearing, no streaking, no hazing, just a deep, slick, easy, cost effective shine.
Happy customer, right here.
Tony