I had my iPad 3 for the past 4 years and have no issues with it, it is the perfect companion for doing your documents, web browsing, gaming and everything! with a 10" retina display screen and very long lasting battery, camera could have been better with a 5mp back cam but it does its job well!
One of the primary problems was with the iPad 3 is its size and weight. Android tablets have been getting better and better and now compete with the iPad. Apple has rectified this with the iPad Air, which will match the iPad mini 2 in design.
Performance of the iPad 3 is solid and, happily the advent of iOS 7 hasn’t caused the dreaded slowdown on the iPad 3, it still runs well.