I was using an ipad and it was a complete pain in the ass, just too big and couldn't mount it anywhere. I didn't want to shell out for a Mini, so tried it on the wifes Galaxy Tab, SD was rubbish and kept crashing.
In the end, I bought a Nexus 7 for £130. SD runs beautifully (twice the processing power of the ipad mini and Galaxy) and the size is perfect. I got a Ram yoke mount and the setup is spot on.
