The top & bottom of watch face (two thin strips), sides (1 large piece) and button pieces (2 button sized cut outs) are separate.
The sides are actually 1 big piece that wraps under the base of the watch, with a large cutout around the ceramic/composite sensor circle.
I couldn't get the sides/bottom sensor areas to adhere right, so I tried hacking off the sides so I wouldn't have to deal with the bottom part. They didn't cut cleanly (my fault), so I just gave up on that part.
I could tell that I wouldn't like the sides much though. It definitely is much more visible due to all the little cutouts for the speaker/mic on one side, and the two buttons on the other. It's also hard to get this piece to cleaning meet with the top and bottom pieces.