Some people get skin peeling and redness when they first start using it. I never experienced this on the .025%, which is what I use now. My skin has tolerated it quite well. I'll be checking in with my Doctor this week to see about upgrading to .05% (the idea is to ultimately work your way up to .1%, which I believe is the strongest available).
It should put your wrinkles slightly above baseline and prevent them from developing further. By using it though, you're making a full time commitment to wearing sunscreen...this is super important to understand if you decide to use tretinoin.