I'm thinking these maybe the way to go for our vanity backsplash in our master. With the wall the walls enclose the vanity I think it would be too messy to try and do thin set. Plus it's not a "wet" area.
Also, we haven't figure out a way to "finish" the edges of the backsplash. Do we just tape and caulk? We have caulk to match. I'm not a fan of the metal caps or the little wood pieces like YHL did.
We used them to do our entire kitchen backsplash and were really pleased. The only thing is there is hardly any "give" to the tiles once you place them, so be sure your placement is spot on before you press hard to pop the glue pockets. I would use them again - super easy to use and a huge help to beginner tilers such as us!