This looks like a really cool idea. I have always thought it would be interesting to have a picture of me or other people taken each day. From day to day it probably wouldn't be that different, but it would be fun to look at long term changes. This seems like a service that will make that happen.
I use it occasionally. At first I thought it was a bit of a gimmick, but actually, it's quite nice. Posing for a picture is quite an expressive medium.