I'm using the strips and the toothpaste right now, making up for my stupidity as a kid in not brushing.
Anyway. Using Crest Extra Whitening w/Tartar Protection toothpaste that doesn't really seem to work all that much. I was using this prior to the strips because it was cheaper. I'm continuing to use it while I'm using the strips and will continue afterward in hopes of keeping the whiteness I've attained.
Which leads me to the second part, the strips
work. It is a slow process, but I noticed a difference after the second day. Each progressive day brings a little more of a change, but nothing quite as noticeable as the second day. My gums were seriously irritated by the peroxide at first, almost to the point of wanting to rip the strips out and continually rince my mouth out.
Almost. I haven't experienced any problems these past few days, however. I picked them up from the local Kroger affiliate for ~$24 last Sunday, so I'm halfway through the kit.
If you're looking for a cheaper solution to whitening your teeth or are just nervous about going to the dentist, I'd say try them out. Just my two cents.