I bought the HTC Desire S and stood between the election: this envelope "mumbi TPU Silicone Case HTC Desire S Silicone Case ..... 'or another shell (silicone, soft).
I had previously "soft" the HTC Legend with a silicone shell, and was actually quite happy with it (shell and mobile).
Unfortunately, I have decided to use this envelope and not for the soft.
Problems with this shell / shell:
The word shell hits the nail because it is so hard that the knobs (volume + Lock) you can press hard, I cut out the area of the lock button, and use my fingernail to press this ..
To get the phone in the shell is an ordeal! I had to press very hard and turn ...
On the whole: the shell meets your job, but alas one wants to take the phone out of his shell to clean example ... press Knöpe so not fun.
(Hands off.)