I use the NXT detail spray. I have no problems with it, but then I never expected a lot in the beginning. I use it only for quick de-bugging, de-dusting, de-bird pooping, de-sapping, etc. I use my other products for shine, durability etc.
P.S. On the spray wax, I use that as a booster. A quick waxing of the front end before I head out in the morning into a sea of bugs.