Tell me about the iPhone 5

Ok so I'm thinking about buying an iPhone 5 because my Galaxy Nexus is getting long in the tooth and Verizon's smartphone selection is not that great. The only other phone I would consider is the Galaxy S4.

So, how has your experience been with the iPhone 5? How is the battery life? (Very important because my Galaxy Nexus has terrible battery life) Does it really scuff easily without a case? How is the durability? Speaker quality? A few of my friends' iPhone 5's have also had the power button stop working so I'm kind of apprehensive about that as well.