I have a "pure" (rather than flat) black 997tt and had the Armor Glove installed by the group out of Cos Cob. They came to my house in NJ and did the process - took about 5 hours - looks great and has worked perfectly (only 2500 miles on the car). There is nothing that looks as good as a clean, well waxed "pure" black Porsche (especially if it's the 997tt)

As far as keeping it clean - I wash it when it needs it (pretty frequently) and wax it frequently with Menzerna Full Molecular Jacket - it is a polymer wax formulated in Germany for German paints. Goes on and comes off easier than anything I've ever used and makes the black really "pop"

BTW - I use Plexus plastic cleaner on the Armor Glove, as recommended by the installers