Finally got my testdrive at Jemca Bracknell (after the GR86 being double-booked on Wednesday's first attempt) and I was able to enjoy 90mins unaccompanied fun, taking it up through Maidehead and up into Cookham.
I came away with mixed feelings, as I wasn't wholly gelling with the way the car drove. It's difficult to describe; I felt that the gearshift was solid, mechanical, and "shunk-y" whilst the clutch required more finesse and a smoother, almost delicate action, and I wasn't able to fully enjoy rowing through the gears. (I see it mentioned elsewhere that there is a clutch spring "fix", so I'm not too worried.)
I also didn't enjoy the budget stereo particularly, but that could well be because Christmas tunes kept coming on and it's only figgin' November!
Grumps out of the way, on to things I really enjoyed. The driving position, seats, and especially the steering wheel were exquisite and were a great place to be, and I loved the view out to the smurf-wrapped frontage.
The car felt full of poise and alive under me, and the engine and gearing very flexible, with it flowing nicely along the backroads I'd chosen. I pushed it up into the higher revs a few times and each time it sounded suitably angry and dramatic.
Overall, I think the car would reward the driver who befriends it, takes time to learn its ways and quirks, and takes it to their bosom. The GRY I came away from absolutely buzzing, and the GRS also gave me great vibes (in a different way); the GR86 wasn't instant attraction for me, but I suspect it will get under my skin and I'll end up obsessing over it, and waking up in a cold sweat dreaming about it!