I've been playing from my phone mostly, and it seems run well. The only issue I've run into is difficulty selecting some of the menus. Also the referral link is impossible for me to highlight and copy for some reason.
I've tried playing from the iPad, but there are a few things you can't do. Like sitting a guy or activating a player. So, when I need to do more than check out the forum or watch a game, I use the computer.