I received my TPU case a couple of days ago and am very happy with it. It actually fits both the home dock and the car dock BETTER than the Bionic with no cover. I say it fits better because it seems to line up easier and sets on the USB plug easier than it did with no cover.
I like the looks and feel of the Bionic better with no cover, but this cover is pretty unobtrusive and does offer a little protection. The one odd thing about this cover is that it covers the volume rocker, but it has molded pads that line up perfectly and is just as easy to use as uncovered. I actually like that feature as it keeps the dust out. The case is just the perfect texture for me. I keep my phone in a dedicated side pocket in carpenter jeans and sometimes the phone would slip out when reclining in a chair or laying on the couch. That is no longer the case with the TPU case on. It adds a little bulk and a little more friction that really helps keep it in the pocket, yet is still very easy to remove.
For eight bucks it seems like a really nice case. Fit and finish were excellent. It is a keeper for me.