I love the nxt because it does not leave a residue on trim (atleast on mine) .
I just clay bar'd my entire LS last night and then NXT waxed it in 2 hours total. It used to take me 3 hours to wax a car alone.
I have used NXT for a few months and it really shines nice , it is not the greatest at scratch filling. It lasts 3 months but since i started using ultimate detailer and speed shine(?) it lasts longer and looks better every time. These products keep it beading and lasting longer as well as a deeper shine each time.
Hands down for $13 at an American Wal mart it is a steal for what it does and the time it saves.
In Canada it is $28
BTW I use my clay bar to remove odd wax residue on trim.