I just got mine today as well. I love the case but was bummed by a couple of minor defects in the TPU (one on the outer corner of the case, and one on the inner lip that rests against the phone screen. Nothing too bad, but it does detract a bit from the otherwise excellent look of this case.
Also, as mentioned, the matte back is not the grippiest material, but it isn't as big an issue because the glossy sides of the case are grippier, and as a result, I don't have any issues with holding the phone. The added advantage is that the phone slides in and out of my pocket very easily without picking up lots of dust, etc. I compared the matte back of my case v/s the rubbery plastic backing of the HTC rezound, and they felt very similar.
On the whole, I really love this case. I just wish I could get a defect free one (wouldn't mind paying an extra $5). It has to be the best looking case for the price though. I can't believe that something costing 10 bucks could look so nice on my phone. I'm probably going to give Diztronic some more business pretty soon