I received my TPU case today and I can honestly say that this is my favorite case so far. The entire inside edge of the case has a slight edge that keeps it on the phone. This means that the phone is always open just a bit, but also that the 2 halves are flush all the way around except for the middle top and bottom.
With the keyboard out, the two halves of the phone actually rest on the case instead of the little rubber pads built in. It's actually quite nice since it's the same on the front and back, and it's a long stable surface. Feels like there's less wiggle both open and closed.
The volume, camera, and power buttons are covered, but the case is raised in those areas so you can still feel where they are. The volume and camera buttons are still easy to press, but the power button takes a lot of force to push. This is probably due to the stiffness of the case and small size of the button. I might try gluing a tiny plastic shim on the inside of the case there to make it easier to press. In the mean time, I just added a shortcut to lock it on my home screen.
I don't like the shape of the cutout for the touch screen. I would prefer the top of the opening to not cover around the speaker, even though there are cutouts for that and the light/proximity sensors. I'd also like the bottom of the screen cutout to follow the curvature of the screen instead of being so squared off.
I wasn't so sure about the argyle pattern on the back, but I kinda like it now. It's rather subtle at certain angles. The clear looks good except for a couple spots on the front where it looks a little dull or matte from the inside. I may end up ordering a smoke colored one later on if this one starts to discolor (like paste cases of this material have before).
Overall, I highly recommend these cases!