I fitted the SSL front (and later rear) to my +8 in the early days.
I drove Peter Ballard's 4/4 and was really impressed with both the improvements in the ride quality and the almost total lack of roll. After this I ordered a set pronto and set about fitting it with a mate.
Initially I thought that the before/after was much less marked with my +8 than Peter's 4/4. The kit was designed and optimised around the lighter 4/4 and after discussing with Peter did a few other comparative tests with other cars. Obviously everything is subjective but the improvements I noticed with the 4/4s were definitely greater than with +8s.
However there certainly is an improvement with my +8 (and my wife noticed it almost immediately without any prompting) , and this appeared to get more marked once the rear SSL kit was fitted.
Yes the SSL kit is not cheap, it is still a premium compared to a "standard" rebuild with MMC parts, but it does bring other benefits that the latter doesn't and that it worth the difference in my opinion.
