Hey drew100 --- have a look through the post by Apollo2009 ``2 Videos from Norway - comments`` -- I left a lot of comments there about the all Poly systems and the pros/cons of them . My main issue was scalp-health after a while. Admittedly it took over a year to manifest itself, but the skin was becoming irritated and broken / itchy presumably from the trapped sweat/oils etc .It couldn`t be good for your scalp to have this thing glued to it for 3 weeks or more and the pores constantly blocked with glue. In terms of comfort and general wearing ---yeah, fine no problems there and you can get a really strong bond as the whole scalp is literally coated in glue -- a person could literally grab your hair on top into a ball and lift you off the ground with no fear of the system detaching [especially with a fresh bond] I think generally, lace or mostly lace is better as the skin can breathe and they are very light -much like a piece of silk really. A lot too depends on your own body make-up....... some people can stay wearing all- poly for ever with no issues, but others can`t. It`s been a few years since I wore them, and maybe the newer poly is a bit lighter, but still, it`s a layer of artificial skin on top of your own and my own feeling is that it will lead to issues with your scalp after prolonged constant wear ... cheers, Paul.