However, a major shortcoming is the state function. Who puts on value, I definitely rate on this envelope. If you get it on smooth and hard surfaces still halfway down, you have to soft and uneven surfaces no status. So if you in bed or on the sofa like watching movies should look for another shell, I recommend the sleeve of Goodstyle that is also here to obtain through Amazon. Although costs a little more, but provides a very firm stand and an all-round protection.