I like the Pixelskin HD better. I used it on my iphone 4 for over a year and it kept it very protected without adding too much bulk. Be careful though as not all Pixelskin HD cases are the same. Some have manufacture defects were the volume and sleep buttons will be very hard to press. The volume and sleep buttons are supposed to press with ease and not hard so make sure if you get one, you get one without defects. I bought over 6 of them for different iphone 4 phones so I know what I am talking about. Out of the 6, 3 had the defect to the point where the buttons were almost unusable. Also, a case that is very similar to the Pixelskin HD and is just as thin and protective that I really like is the Incipio NGP case. It also makes a lip above the screen so you also get the screen protected.