I recommend using UnlockBase. They're extremely helpful and overall, great company. You have to be careful because a lot of them can look OK, but in the end you can get burned. I hope this helps!
Great thread.
Value it would add in my life - do I need it? will it help save me time? how will this help me?
Evaluating cost based on value
Research - taking a look at reviews, what did others have to say about it?
I love the one for my 5! They have new ones that don't have the plastic screen over it, which is so awesome because it wouldn't give the same clear effect.