Nope, they wouldnt let us drive it (mind you in my case theyd seen how incompetent I was on the track already!)
I doubt itd feel any quicker, it probably rolls a bit less than standard but mines lowered anyway. Really nice looking car though, but I cant help thinking Id miss the creature comforts after a while. I do like the wheels though. The interior is a bit garish - lots of metallic blue trim everywhere.
Removing the sound-deadening is ok for a standard car, but it will probably become a bit boomy with a Magnex fitted which I imagine many owners would do at some stage.
BTW I did ask the Renault guys about warranty friendly mods like exhausts, induction kits etc and they told me they were unaware of any such thing, which is disappointing as they would have been suitable for all 172s. Ah well, back to Demon Tweeks it is then...