I ordered the Terrapin transparent sleeve for my black Lumia 830. The mobile phone is very comfortable to hold, with a pleasant feeling. It's like a flatterer. I think the change of the pressure point more positive than negative. This prevents an unwanted better start when inserting or get out of your pocket. The black of the mobile-back, however, we color more gray changed through the casing in direction. But I can live with. Also looks chic. So, I can recommend.