I too have a Lifeproof case for my iPhone 5. While I do like it, my first case arrived defective. It took over a month for Lifeproof to even respond to my request to replace the defective case - which was reported the same day it arrived. They then had the gall to make me pay to ship the old one back. That REALLY sucked. Just sayin'.
I also have a Lifeproof case for my iPad
. It IS heavy, but it's been great.
Lifeproof makes pretty good products, but the "Service" in their "Customer Service" is the part of the definition that says "What a bull does to a cow". I have a REALLY hard time with that.