The clear slim crystal back case cover fits snugly on to the iPhone 3GS and protects the back and edges from becoming scratched. Until Apple begins to make its products out of scratch-resistant materials, there will be a market for this kind of cover. Advantages: you can see the back through it, it's very slim, so doesn't add significantly to the bulk of the iPhone in your pocket/handbag etc. Disadvantage (and an everso slight one) is that particles from aforementioned pocket/handbag get stuck between the cover and the iPhone, necessitating a regular clean. That said, popping it off and giving it a polish is very easy and quick. But let's not be picky: this is excellent value for money. By the way, you will need a screen protector, too, because that scratches too (come on, Apple).
This case (made from rigid plastic similar to a biro case) fits the IPhone 3GS perfectly and protects the back and the sides of the phone from scratches while giving the appearance of the unsheathed phone. The case does not intrude onto the screen as I have found other cases to do, however it also offers no protection whatsoever for the front, so I'd suggest finding some screen protector sheets too. All in all, I consider this to be a worthwhile purchase especially at this price, and it is ideal if you are wanting a subtle cover for your phone. Four stars instead of five because you need to take it off fairly often to clear out the dust that can accumulate between the case and the phone, and also because there is no protection against scratches on the camera lens which would potentially be pretty serious. I got around this by using a small square of screen protecting film over the lens (which is invisible through the camera).
Generally poor quality item, case has several non-remvoable scratches on it. The plastic is of poor quality and leaves parks everywhere. I think its purpose is in contrast to what is states - My iphone looks horrendous with this flimsy case. I would personally not reccomend this to any Iphone users.