One of the areas in which it falls down is its volume in social settings for augmentative and alternative communication (AAC) users. It needs additional amplification to make it more successful as an AAC option when there is other ambient noise. The iAdapter from AMDi is a rugged protective case with in built speakers which allow for much higher volume output from the iPad.
Spectronics did sell the iAdapter for the original iPad and the iAdapter 2 for the iPad 2 for a short time, but we are no longer supplying it. It is still available however from Adam Lynn at Communicate AT in Australia and from Desktop Technology Services (DTSL) in New Zealand. Hope this helps you to track one down!