I bought one, used it a few times and its just a bit gimmicky.
No real purpose I found.
Funny you saying that.....
I always wanted a ScanGauge II, and I got one from
Evi that had very little use.
For the first few days maybe weeks) I would look across at it to see what the turbo boost
pressure was on my remapped CDi, but in the end; just like you; I found eventually I hardly
ever looked at it. It's great for any mates or people who never seen one stare blindly at it
and maybe ask the odd question or what it can do etc (sometimes saying "that's awesome")
but the next time they'd ignore it, just as I was doing.
That's not to say it isn't an awesome bit of equipment...because it really is.
It's perfect for technophobes (aka 'geeks') or for track day use, or checking set-ups etc.
and I'm sure someone would find a very good use for it that I so far just haven't.
So now I've unplugged it and it just sits there. One day I'll take it out of the car.