Take a good look at it when it's done. I wish I had made more of a fuss about it at the time they were doing it, but I have some areas where they didn't do a very good job of revealing the aggregate. They should have washed off more of the plaster in those areas. I've now got that as a "clean up" item on my punch list with the PB. I know it's a hand applied product and I'm certainly tolerant of some variation, but these few areas were a little more than I was willing to accept.