These OEM BlackBerry Skins are the perfect match for me and my BlackBerry 8330m.  They fit perfectly (despite some other comments claiming they're too loose.  Check your model again if it's too loose.), offer shock protection if the phone is dropped, slip protection so the phone doesn't slide around in the car, and they last about 6 months through constant use before they start to rip and, what I call "melt".  The silicone breaks down after 6 months on average, but since they're so cheap, I just bought two of them at a time and change them out as they wear out about twice a year.  I'd highly recommend these... although understand they're not for everyone.  The "grippiness" of the silicone will drive you crazy if you make a habit of keeping your phone in your pocket.  If you don't carry your phone in your pocket EVER like me, these are perfectly paired with a high quality screen protector, like Ghost Armor.