Presumably you mean black PVD specifically? (PVD is the name of the treatment process - Most gold plated watches are also coated using Physical Vapour Deposition too).
If so, I love it.
The trouble I've found is that people tend to presume any black watch is PVD treated. Not the case, most of the cheaper ones (Seiko, Citizen, Rotary and the boutique stuff etc) are Ion Plated, which is just a very cheap flimsy black coating over the steel which WILL look a mess if it's scratched. PVD coating is quite a bit more durable.
The best watch I've had with the PVD treatment was a Victorinox Dive-Master 500, looked amazing with the orange dial against the black and after a couple of years light wear it still looked like new.