This is the advanced seal, professional version. These strips do a remarkable job on whitening your teeth. My wife and I use them every six months and see a discernable difference each time. My only complaint would be that every box seems to have one or two strips that when you pull it off of the plastic backing it takes the backing with it. It is very difficult to then separate the adhesive strip from the plastic backing. Otherwise this is a comparatively easy and so far as I have seen safe method to whiten your teeth.
I might add that you can find some pretty wide ranges between prices on this product. Amazon often has the best price but I have had some luck on eBay as well. You can get them in the $25 range if you shop around. Considering they seem to sell for $40 in the drug store, it is worth taking the time to shop around.