A few months on from having the SSL suspension setup fitted, I've been over to William to meet Peter Ballard and make minor changes. A whisker stiffer at the front, and an extra 10mm ride height - in both cases not so much of a change that it alters the car's feel, but enough to make the car more usable.
I found that the factory standard ride height was often the limiting factor in using the car - from sleeping policemen to fast, undulating B roads, the standard Aero is set too low to fully exploit its performance, With the SSL setup the front and rear work together, which makes it easier to exploit more of the car's performance.
My best measure of how much more useable the Aero is with SSL's suspension is that I can now drive longer without breaks. For example (with the hardtop on) yesterday I happily did the 3 hour cross-country route from Bath to Hove non-stop.
The next upgrade will be to properly soundproof the roof, which gets noisy above 60mph - the Aero is well on its way to being a proper GT.