Very, very handy! If you create music and use Apple products, iRig Pro I\O can help record both at home and on the go without any complicated set ups. I can connect the mic, guitar and piano, the cables and adapters are included. Plus they give us several nice apps to boost some creativity. The sound quality is clean and very decent!
The only things to make it even better - I wish they would include a guitar cable and an adapter that can charge the device (these can be bought separately).
I recommend this (iRig Pro I\O) over the previous version (iRig Pro, no I\O), because of the better sound quality and because this one is capable of charging the iPad.
A great choice overall!