I had a few thin skin units in the distant past.. It was around 7 years ago. One dis-advantage I remember is not being able to stretch the piece. If you tried to do that, you would wrinkle the base, and it would be ruined.

Also, must have a full head bond, or you will get a plastic sound every time you touch your head.

Oh, and some of the other comments here about the hairline.. Can't really get away with lift like you can with lace to a certain point.