I would reckon Auto Gauge is value for money, it's like no point having a hi-fi quality set just to watch pirated VCDs or having the latest Pentium 4 3.2Ghz with 1GB RAM just to do some word processing, u get the idea?
As for me, I was skeptical too... having DEFI all over... but that was before I got hold of the Auto Gauge stuff.
Give it a try, it's good value!