This review is from: Black Premium PU Leather Flip Case for Apple iPhone 4S / iPhone 4 (Wireless Phone Accessory)
I originally purchased a very expensive plastic case (£17) and a separate screen cover that cost £7.97. The former was simply a cheap bit of lightweight plastic and the latter caused no end of trouble trying to attach the screen cover without bubbles, even after six separate attempts. I bought the leather case for my wife - since she tends to sling the iPhone in her handbag and it offers good protection - but was so impressed that I immediately ordered one for myself. Great protection and the (included) screen protector went on in 10 minutes without a single air bubble.
Absolutely superb value for money and very highly recommended indeed. (It also arrived by the next day's post which is impressive too.)