Anyone heard of or used these tuners?

Basically need a service for my RS nothing major just a general tune up and performance tweak!
I need something local'ish to Surrey....Power Engineering are just about the furthest I can travel as I'm gonna need to make a few journeys so closer the better, but obviously dont wanna sacrifice quality.
Saw these in PF just wondered if anyone had any info on them : http://www.vanaaken.com/europe/advan...ollingroad.htm

Otherwise I've just heard of Julian Godfrey Engineering on another thread: http://www.racetuners.com/
again have no info on them really.

MADevelepments are recommended to me the most but Ive rung him and he refuses to work on RSTs anymore which is a right bugger

So....what can you guys recommend?