Personally, I love my hudy system, but hate carrying and setting it up... I don't bring my Hudy to the track, at the track I'm using one of the first RPM camber guages made and an ancient toe-in guage if I need to make any changes...
The thing I see with the Hudy or similiar systems is you get to really see the slop in your car... I can guarantee that everyon'e steering has about 2 deg of slop in it... Except maybe Chris and Josh
I find that the Hudy is just as good for my electrics as well as my nitro.... Now if I could only see spending the money for one for my 1/5th scale...