Oettinger have a long and unrivalled heritage when it comes to VAG tuning, but got into financial trouble a couple of years back I think. APR from the USA bought them and from what I know,
Really!

They are still listed as a German private company (GmbH - which is equvalent to a UK 'Limited' company), trading under German law (Bad Homburg)?
the APR remap isn't much different from the Oettinger remap, if not the same, although I would have thought differences would at least exist to allow for the rubbish fuel in the USA.
I think all the APR products for the Mk5 are simply 'rebadged' Oettinger products - their intercooler is a classic example.
If the e-map is based on or is the Oettinger remap, then I'd say its a good base to start with. However, I think the experience and know-how of the person applying and tweaking the map is equally as important. Your e-map might feel fantastic - and maybe it is a very good map and I can't say either way - but you never know whats going on underneath the bonnet and what the long-term effects will be, which is why I went to an established and very experienced tuner like Revo.
I fully agree. I would personally think it is vital.

There are far too many people who can now simply purchase a load of 'generic' maps from a non-descript German, Dutch or wherever software 'tuning company' - and then simply re-sell them as though they were their own work. Some of these resellers will even tweak the maps further themselves, and neither the target car, nor any development car has never even had a sniff at a rolling road. Which is why I too would prefer to use a more 'established' tuner, but equally as important, a tuner who has proven relevent experience on your own particular engine.
So, whilst Nick at R-Tech does indeed have very good reviews, his 'knowledge base' seems to be mainly centred on the 1.8 20vT and the 1.9TDI - and he seems to have little experience of any FSI engine, be that the 2.0 TFSI, or any of the Audi V6 or V8 FSI engines. So unfortunatley, neither my GTI nor my RS4 won't be remaped by Nick - which is sad, because he really does seem to be one of the rare breed of genuine guys out there.

My own experience is with Revo, but I'd say that APR, Oettinger, GIAC and Superchips are on a similar level.
In what way?
There is absolutely no way that Superchips could EVER be described as a 'VAG specialist' - and this was highlighted on a Fifth Gear test a little while back - where Superchips failed miserably.
And whilst GIAC are a VAG specialist, and they have been shown to make very good power, there is still the concern that they do not have access to 'European' maps, and so have no real in-depth knowledge of the 'stratified' fuel delivery mode.
There are other reputable, but not so well known (which doesn't mean they are inferior) smaller tuners like AMD, R-Tech and VWR who also provide remaps.
Agreed again. But the trouble with these lesser known or smaller tuners - is simply how do they stack up in the long hall. And regarding 'motorsport' companies (and I am NOT singling out just VWR here), I would very strongly suggest that a 'motorsport' map is not at all suitable for a 'road car', for a whole variety of reasons.
I have personally driven the VWR demo car and can attest to its superb remap which is used on the offical VW Racing track cars - I think VWR are the only offically permitted producers of Scirocco track cars for VW motorsport use, so they're pretty good too.
Without dragging up old stuff again, I would strongly doubt that VWR are the
only official company allowed to provide their services!
