I just bought this for Otis today!
As a veteran dog transporter (I've been carrying Otis around for nearly six years now!) my shoulders are going out of whack, and I really needed something comfortable.
The Celltei bag is SOOOOOO comfortable, I'm already thinking about getting another one in a different color. It uses a diagonal shoulder strap, kind of like a messanger bag. It's well-padded and has tons of little pockets everywhere. It's very well made, sturdy, and hip.
One drawback is my wallet won't fit into any of the pockets, but I have an extra fat wallet....so maybe I'll need to buy a new smaller wallet.
Here are pix. (that ugly blue thing is a pilates mat...ignore it.)