I've installed this CarPlay unit, but into my VW Golf
Not my car but this is it in a T5
It's cheaper than the Alpine at around £280
http://www.roadradio.com/Pioneer/SPH-DA120/?gclid=CJqrpNCu4MoCFYoEwwod47MJUw
Quick review of CarPlay and pro's and cons.
Carplay
Works great when it works, fantastic even, though it is pretty flaky, sometimes Siri doesn't come up, sometimes Apps (Spotify) refuse to play music, shutting down the Apps on the phone and plugging in again does sort this.
The navigation is good, although I make sure I play my route before I go in case I go offline.
Pro's and Con's of this Pioneer vs the Alpine:
Pro's
Cheaper than Alpine, over £150 cheaper
Bluetooth built in, this was big for me, this means you can answer / make calls without plugging your phone in, plus play music etc.
Cons
Doesn't have a physical Siri button, the Alpine does and I can see why it can be needed as finding the little home button and holding it down whilst you're driving isn't that easy
Personally think the Alpine unit looks nicer.
Will feedback more later, only had the unit in a few days, loving the Golf (2010 GT TDI) as a change to the Cali (will always love that Cali more of course!)