New Head Unit vs iPad Air

[stuvoi]

Hi,

I have just bought a T6 Redline Conversion (It is the T6 Startline) - so the HeadUnit is okay, but not the best.

So I have been thinking about either getting a decent headunit (Alpine 9" or Kenwood 7")

But then thought about just using Ipad Air (with with a mounting bracket)

So wasn't sure if people have had experience of both and have any recommends?