I have just had the P5 suspension fitted and find that in day to day driving it is no stiffer than the std mk1 suspension. The difference comes when you corner where you will find the level of control is much greater but it just feels right. It is the exact opposite of a friends car with SPAX fitted which felt as if the suspension had no travel in it at all, making it very very firm; in fact it felt like the suspension had been removed....A couple of people have mentioned the "firmness" of the P5 suspension. Does it adjust down to fairly soft? Am looking for a new setup as the car came with KYB's on the front, billies on the rear and seriously low springs. Have had enough of hitting my head on the roof on some of the rougher roads round here!
That's kinda how mine feels. great on smooth roads but they are rare!