I've tried Sheer Cover and Bare Minerals. Bare Minerals by far is the better makeup. Sheer Cover is not only minerals. The cover up is creame based and when the mineral powder is applied, it sometimes cakes for me.
Sheer Cover is least expensive when trying their starter unit, but it only lasts for 30 days. On the other hand, Bare Minerals costs more for their starter unit, but the sizes of the makeup are the same that is sent when next ordered.
By the way, Bare Minerals lasts a long time. When they send a 60 day supply, it lasts for at least 6 months. Applied every day. This is true for my 3 daughters, and 1 granddaughter. I ordered it first, and when the next supply came gave it to my daughter, then to the next one etc.
For me, wearing it when I go out which is rare and on those special occations, I use one supply per year. That's the reason all 5 of us can use one order:)