I have several of these minimalist cases, and all are pretty nice. The feather looks nice, but a couple of the corners would snap loose a little while in my pocket, so I would need to push them back onto the phone. Never had a problem with flaking, however.
The SGP is almost perfect. Less of a matte finish, so a little more slippery. Looks really nice on the phone.
Another alernative I like better than the Feather is the Photive Slim. Nice matte finish, and no flaking so far. There are a couple slight ridges on the back that are kind of nice for keeping it off the table. The matte finish gives more grip than the SGP.
I also have an Elago alternative, but just did not like the seam that runs around the side. It's subtle, but kind of bugged me anyway.