I bought the type 01 off amazon a few weeks back. First off, it is very solid and well machined. The way it holds the phone is unique in that the sides are not touched at all. The finish is smooth to the touch and the iPhone is removed from the metal by a thin foam layer. As for protection, being aluminum and that a drop on a corner would bend the metal I am quite confident it would survive a good drop on concrete. I'm not really sure how the screen would fare if dropped face down, but because of the ring of metal it may not be that bad. It is heavy, and noticeably larger then the phone. Realistically I can not use it on a daily basis as it does not fit easily in a pants pocket. Overall the design may not (and obviously to some here) appeal to everyone, but it is unique and will protect the phone to a decent degree. Needless to say I did return it at the end of my testing. It did not effect my signal strength at all when in use, I used the field test mode at two different times both with the case on, and off. The only annoyance is the number of screws required for assembly. Overall I was impressed by this case.