I used to use my Transformer tablet and the docking keyboard for note taking, but I had already used a netbook for notes when my real laptop fried.
The small keyboards are cumbersome for note taking, and frankly a laptop will always beat it. If they need to do anything MS Office related they only real option you have is something that can either run the full Office Suite, or something compatible. To my knowledge anything running Android does not have a 100% compatible Office Suite yet (I have not looked recently though). I am pretty sure the Microsoft products are, and MS may have made an iPad app by now.