Anyone try Buildtak?

Has anyone tried those new Buildtak things I see floating around? see http://www.buildtak.com/

I'm always hesitant to buy products like this, but I've really heard nothing but good things about them. They run about $10 each so I'm strongly considering giving these a try.

https://www.youtube.com/watch?v=QfuoFE42cdM

I ordered a 10 pack of these last week, and I must say, I am very pleased. They do everything they say they do. Sure the price is a bit high but they are worth the money.