The of Mumbi was my clear favorite. Passable design, applying very precise fit and without thick.
The test has the shell then passed with flying colors, when I accidentally on the car roof was leave my HTC One X times. Two gyro has kept it at 100 kph on the highway, it then sailed into the grass verge. Thank you Google tracking function I found it quickly and to my surprise it was completely intact (it is not landed on the glass side, fortunately). Only a few scratches and abrasions testify to the envelope of the mishap.
In this respect, I have not a long time about what shell I should buy myself for my new HTC One M9.
A couple of reviews here have something irritates me, fortunately I have yet accessed.
The shell has cutouts at the top (for the infrared part), at the bottom (for headphones and USB port) on the back (for camera, flash, etc.). The power button and the buttons up / disappear quietly as the old Case for One X behind accurately fitting rubber covers. Similar problems with the pressure point I have no reason. All three buttons can be operated easily and with normal pressure as no shell. Coating of shell took a few seconds, because they really applied very precisely, but I do not see as a disadvantage, but as a necessity.
The only potential gripe: the camera on the back is only slightly lower as the rubber sheath. Should also this phone once so must join in a similar glider through the grounds at the back, the camera is likely making sure more damage, or at least gotten the fairly large lens of M9 scratches. But that practice must show.
In any case, the mobile phone to the shell feels very good and is comfortable grip in hand. The few days without shell I felt really uncomfortable. Firstly, because as a mobile phone already gladly times falls out of your hand or pocket, and secondly because the very smooth, round surface of the M9 is slightly less firm in his hand, as the protective cover.
A large X is also not to be seen on the back, as in min. expressed a review (which was printed in my old HTC One X, in fact). I have the impression that here amazon reviews for numerous mumbi cases for several HTC devices seems to roll through each other.
I can in any case recommend the sleeve at the price. If it again two years anstandlos by holding as its predecessor, the few euros are well invested and protect in any case before the small errors in daily life, if one falls off the table or cell phone time from his jacket pocket.