Just tested this mod this weekend. First impressions were great.
For those who doesn't know this mod, you can find many classes of many cars as:
Ford Focus - Several Porsche and BMW models - Honda Civic and S2000 - Renault Clios
Volvos - Peugeot - Opel Astra DTM model and the lovely
Opel Manta - Maserati 3200 GT
Lotus - Alfa 147 diesel and so on.......185 models.
I did a 1 hour race at Zandvoort with a S3 class Clio and it was a blast, fighting with other Clios,
Honda Civic and a few BMW.
I must warn you...it is an addictive mod.