I wrote my initial review of the Covergirl + Olay Tone Rehab 2 in 1 foundation and powder on the Buzz Agent website here (and my before and after photo is there).
They claim it'll improve your skin texture in 3 weeks. I wasn't sure how well it work for me because I'm fairly sensitive to Olay products, so it could very well make it worse.
Short story is it works great. My 69 year old mother and I both tested it because our skin texture is so different. Her skin is dry and heavily lined. Mine is combination with pretty good lines around my eyes, and occasional acne flare-ups (not to mention my eczema).
For both of us the foundation had great medium coverage. I tried it both with and without primer, and it blended well either way. I prefer blending with a damp sponge, Mom with a brush. It didn't settle in any lines, and didn't look (or feel) too heavy.
The foundation didn't oil up too bad in the t-zone if I used an oil reducing moisturizer. Mom had zero problems. It lasts several hours, even on super hot days. I didn't have any transfer issues on my clothes once it was set. Bonus? It doesn't oxidize on me.
The powder was a bit different. It is actually quite heavy. To set your makeup with it you need to be very delicate. I actually used it as a light foundation most of the time. It stays on pretty well though without building up too much when reapplied.
I love it and will repurchase. My skin actually was a bit smoother, and cleared up of eczema. I got so many compliments on my complexion. That in itself is worth it yo me. Try it if you've got combination to dry skin, especially if age is becoming an issue.