Rimmel Fix & Perfect Pro Primer

This is a clear primer that you use under foundation.  It wasn't even on my radar screen that a primer was something I might "need".  But, I received a sample of Sephora's primer with the purchase of some different products, so I gave it a try.  I liked the result of using a primer, so I thought I'd try a less expensive version.  I ordered this from drugstore.com for $8.49.  I really can't tell whether it makes a difference or not - which probably means that it doesn't.  Even though I like Sephora's, when this is used up (which will take a long time), I'm not going to buy another primer.  How many steps do I really need to take when I'm getting ready in the morning?  Sorry, Rimmel - money wasted.