I think it's good to be able to get peoples views both positive and negative.
For example somebody might be thinking about buying a Leon and considering the Aero kit. The oppinions on the kit on this fourm are mixed and to some extent reflects the oppinions of people in general.
That being the case the car with the kit could be difficult to sell but by seeing the negativity on the forum that person now has information to make their choise. If they love the kit they will still buy it but if they are more concerned about selling the car quickly in six months time for the best price and not losing so much money they may opt not to go for it.
The same applies to other extras, the iPod connector isn't great. People now have the information to make the decision as to whether or not its worth them going for it.
EXACTLY what this forum is all about i think! Well said.