I was just messing around and surprised how well the iPad mini fit. No plans for it to be permanent. Personally I'm not a fan of suction cup nav screens and I'm quite happy with the stock unit. It does exactly what I expect it to, show a map all the time, with zero effort. (I blame playing too many games like GTA)
I know there a quite a few people that don't like the OEM nav, now I can tell them to STFU and buy an iPad mini