I used to use the Commuter on all my iPhones, but the one for the One X is just too hard to get on and off for me. I wanted a slimmer case that didn't leave the camera lens hanging out the back (and I didn't want to break the bank either). I found this one on eBay and it's fantastic. And only $7.95, too. The seller ships super fast, too (from California to Kentucky in 2 days).
What I've had: iPhone 3GS, Samsung GSII, HTC One X, Samsung GSM GNex, iPhone 4S, Samsung GN2, Motorola Atrix HD, HTC One X+, Lumia 920, iPhone 5, LGOG, HTC One, Samsung GS4
What I've got: iPhone 5S, LG G2, Moto X