Snell: I use glue only to touch up the very very front of the piece, from time to time. IMHO a really really good glue to have is tight grip, I just used a Q Tip (cotton bud) and press it on the dabber of the glue to get some on then apply it to the very front of the piece, AFTER its already stuck on my head with the tape.

Phoenix: I alternate my pieces, but i would estimate i wear each one for about 3-4 months for best look. I know ppl can get 7 or more months, but it wont work for me. I want a certain style and density. so no more than 4 months for me.

hope that helps

Sam