PROS
Sturdy construction, extends the iPhone's battery life, handy kickstand.
CONS
Not easy to put on or take off, not the cheapest cover you can buy and adds to the size and weight of your iPhone 4.
VERDICT
For under R400 you get a protective cover for your iPhone 4, as well as an additional battery that assist in making you less reliant on wall sockets and nearby USB ports to charge your device.