Iphone LCD and screen replacement?

Haven't done it before and don't really trust myself. Is it worth trying or should I pay a company for a repair?

I've done a 3GS, a 4S and a 5. The 5 is by far the easiest. The 4S is rather involved. The 3GS is poorly designed. YouTube tutorials and see if it's something you want to try. The kits are about 30 bucks on ebay.