Okay guys... I got the SL2i UP model, as I didn't care about the video capability at the time. I'm not regretting it either, as I've had video in another car before and certainly don't miss it.
The VAIS unit integrates so well, you'd think it was a factory installation.
Sound quality is absolutely perfect without any form of distortion whatsoever.
The iPod/iPhone can be completely controlled by either the head unit or steering wheel controls.
The unit comes up as a 2nd CD/MD stacker according to the head unit, but allows for full browsing (high speed) of all playlists, artists, genres etc.
You lose zero functionality of the factory system (unless you have the external CD stacker option, which I'm not even sure was available in Australia)
I like to do everything myself, so I didn't even consider looking into someone else doing it for me. I've been installing car stereos for nearly 15 years now, so very little baffles me these days.
Whereabouts are you located David? I'll install it for $50 if you like :)
I use the unit EVERY time I am in the car. I rarely listen to the radio unless there is a traffic jam somewhere, and never use the inbuilt CD stacker.
I would give every rating for the unit 10/10. I really can't fault it.