It's a fantastic bit to have for any VAG owners. I installed ElsaWin (4.0) as directed in a sheet of paper and had no issues with the install. I installed it on my Ultrabok (no CD/DVD drive) so I had the DVD's copied to a flash drive and installed it from there, worked like a charm.
I only installed the VW data DVD's as my buy on eBay came with the whole VAG set, but there are options available for much more individual options like VW only or Golf, Jetta, Polo only etc. etc.
The info is MUCH more detailed than ElsaWeb because every model is listed separately. On ElsaWeb there was only Golf no GTI or Golf R, but this one has it, so where there are differences between models, this really helps.
Since I'm outside the US anyway, I bought from a UK based seller and it seems most of the ones available are from UK only. The guy who was selling in the US wasn't able to accept payments through eBay and now doesn't have them listed anymore.