Well I took my car to Spires after a lot of research and I would not go anywhere else.
I collected the car a wk later and was totally shocked at the way it felt. It reminded me of my old Lotus Exige, as it went where pointed and the ride was still extremely comfortable yet firm. The adjustability of the Nitron kit was very simply and effective, and the build quality was second to none.
On the track it felt so poised and at home.
I have just bought an E36 M3 and it will be given the Spires treatment next month as would not go anywhere else.