I know there have been a couple of other posts about teeth whitening in the past, but I thought I would bring it back up. A few weeks ago I tried the Go Smile system from Sephora. They are these little capsules with gel that you have to squeeze on your teeth twice a day for 10 days. I had heard that they work great so I happily spent the $90. I dunno...maybe I was expecting too much. My teeth are definately whiter, but they aren't quite white enough. I still have some stains (gross, sorry!) and I would like to get rid of them. I am thinking white strips. Does anyone have a brand they prefer? Any other ideas/advice. What worked for you?