Hi Mate,
Where abouts in Scotland are you?
Do you go to any of the ScottishVag meets?
I'm in Glasgow and would wholeheartedly recommend Ecotune in Hillington.
They are APR distributor for west of Scotland.
I run APR stage 2+ on my gti and so do a lot of people on here who would vouch for the quality.
The main benefit with Ecotune you get a before and after rolling road run with wideband logging and diagnostics. Its not a flash and forget effort. It gives you piece of mind there is no underlying problem before adding software.
APR also allows you to upgrade in stages free of charge for the Software should you decide to keep modding.
Im a self confessed APR and Ecotune fan but i trust them and would like guide people their way.
Cheers, Campbell.