I personally think the iPad mini is the perfect size. I have the larger ipad as well and it is too big for the cockpit. Just my personal preference.
I did all my IR training with the iPad maxi on my lap. I've since flown on and off with it on a yoke ram mount in the 182 and couldn't decide if I liked that better or not. In smooth air it's great. In bumpy air it's following the yoke and I didn't like that.
Then I got a mini and whether on my lap or in a suction cup Ram mount on the LEFT WINDOW it's freaking awesome. VMC, on the window it's a bit in the way for left patterns but IMC it can be angled and put in a GORGEOUS position just to the left of the ASI. The Ram mount holds it still enough to poke at it with my left hand or even reach over with my right if necessary.
Only bad part was the day I didn't make sure the suction cup was solidly attached to the window properly before sticking the mini in the grabber. Tooting along in cruise the mount and iPad popped loose and fell a foot or so onto my left wrist. Ouch! Little bastard. Haha. It's also a little difficult to remount if both hands aren't free. I one-handed popped it out of the mount and let the mount fall behind the seats (keep it out of the rudder pedals) and used the mini from my lap until I had time to mess with it.
Now I give the suction cup a little tug after putting it up there now and I'm considering the dual cup mount just for "backup" in case one of the cups lets go.
But in general I absolutely LOVE mounting it on the left hand side low as I can (less distance to fall and whack my arm -- haha) where it's easy to add to the scan, without it being attached to the yoke.
Get it low enough on the window and angle it out toward you and it's easy to see over it when looking for traffic ahead of the wing in the standard "Cessna forward lean" after lifting the wing to look first and then leaning forward to look around the leading edge in left turns.
It's also just a great place to add it to the scan and the flow. Glance at approach plate, still can see the ASI and Horizon pretty easily without much eyeball effort and then back to the whole six pack for a sec, back to the plate, six pack, engine instruments, six pack, plate, ad nauseum.
Well actually... without ad nauseum... because there's no need to tilt your head forward and down to your lap. Just look left.
If I could permanently mount it to the pillar, with an arm angled down to bring it lower over near the ASI, I'd absolutely love that.