I am given very pleased with the Dot View all features that envelope responds equally well to movements and touches like the display itself, the only negative thing is that it is difficult or impossible to detect with great lighting, this bothers me, however, hardly. I find the built-in features like, answer and reject calls very practical and has the shell prop open just for surfing because you call with the voice function even when closed and can call. I also like the fact that the smartphone locks itself as soon as the envelope falls and Enstperrt is when you open them, I find also good against many recessions that it falls by itself. The material of the casing feels good and it does not contribute to fat so that mobile phone looks quite plump build quality is typical HTC well and leaves nothing to complain about.