I play with a XBOX PC controller, 0 problems here..
It´s almost imposible play a hack and slash with keyboard...
The only thing left for me is to buy 3DS XL for Mirror of Fate 
Not buy a 3DS only for MoF, MoF will launch on HD in 2013...for sure... (mmm MoF don´t like it me much... mm 6.5-7.0/10, but it´s fine for 12 hour.. a normal game, the only interest is the history).