We had our iPad for about 2 years now and have no problems so far with the battery.
Yesterday I went to the Apple Store for some help with my photo's. I had photo's in Aperture and iPhoto, I desperately needed help, LOL. While they were moving my photo's for me they tested my iPhone. They found out my battery was going bad. Actually, I thought my phone was good as far as the battery. I think I had the phone for a about a year, but they looked up my warranty and said I was covered. While replacing the battery they broke the ribbon that held the battery. Since it wasn't fixable they turned around and gave me a new phone. I say that's great customer service.