Beauty Links

I have watched the commercials for Sheer Cover and Bare Minerals and they look good but do they work? Will they make older skin look dry and fill in wrinkles? Does it really cover? Are they a mess? How is LOreal and the cheaper mineral makeup versions? What ingredients do you look for in this type of makeup? I hate wearing liquid foundation when it is hot and humid and thought the powder-mineral makeup might feel better, but I need to cover skin imperfections and dark eye circles!