That stuff is the bomb. I ran into a local limo driver several years ago, who put me onto it, since all their limo's were black. The only thing to beware of though, is after you apply it, and just before you buff it, don't get any of it on or clothes, it won't come out ! It's black dye, and you will have one helluva time getting it out of jeans etc.
I use to buff it with a microfiber cloth, big ones like 15" x 30". A local friend let me use her 12" orbital / random orbital polisher. Never used one before, on paper it should be quicker. Apparently the random orbital feature results in a better finish.
Black cars look superb, esp at night, with chrome rims, but don't stay clean very long...esp with pollen falling off the damned pine tree's after a windstorm.
Done right, it comes out like a mirror finish..and the black dye helps cover up the imperfections.
Turtle wax make a couple of other versions for black cars, like black detailer, jet black, and one other.
I have tried all the other products out there with varying / mixed success. One product I would stay away from is... 'NU-FINISH'...'good for 50 washes' . Works..but you get any of it on the ABS black portions of the car, like front lower spoiler / rear lower fasica , mirrors, etc...and it will turn em milky white asap. The only fix I found for that is plane jane armorall, and that only works for 1-2 months.