our dd who has dyslexia is using an ipad with significant success. She gets books through reading ally and uses Dragon Speak Naturally most often. I just added Hands On Equations app to work on her algebra skills. She has not had it very long, but so far it has proven to be well worth it. THe only issue we have is that the battery is very short lived.
We were told when we purchased it (from the salesman) that the words ipad and durable should not be used in the same sentence. He said even with the best protective covers he has seen them come back with cracked screens and other damage. We opted for the protection plan that would replace it for the next year just in case. As yet, I do not let her take it to school. She has a computer to use there at this point.