The first time I used this patch I wasn't too impressed with the results. I left them on for about 20 minutes and expected a more obvious result than the one I initially had. However, during the second time, I left them on for much, much longer, almost an hour, and after taking them off I could definitely see a difference! The area around my eyes was much softer, brighter and the fine lines had been plumped up significantly. Bear in mind though that this effects only lasts for about a day, so it has to be used regularly!
21 is too pink, 23 is a bit too yellow, I mix it with another foundation to get the correct shade. Over all, it's decent. The brush is okay, but it gets a bit tricky when it comes to cleaning because the brush is on the other end of the foundation stick.