This case is great for the money. I own 3 cases for my iPhone 4s and this is the best one by far.
It has a metal back with a decent cutout for the camera and a nice plastic bumper completely surrounds the edges, all the slots for buttons and speakers etc line up perfect. It comes in 2 pieces and seems quite secure, you just put the phone into the rear part then clip on the front bezel, easy! Feels good in the hands like it won't slip out and I can put the phone face down because the side bumper protrudes just enough to protect the screen but doesn't hinder the use of touch screen.
My mates have seen this and think I paid £20+ for it and when they find out its £8 they all want one. I don't normally do reviews but was so impressed that I had to