I've only slightly revised my opinion :) as I cannot justify the price difference over my IS250. To be honest it doesn't look that much different and the difference in cost is all in the engine and transmission. If I get one it's going to have to go on the track to use it to full potential, or risk being banned within the first week of ownership. No, it's just not practical, no wonder they're not selling well in the UK.
Your right its certainly not practical, however it does work as normal round the streets road car. But it's like any car which such speed and power none of them are practical.
To my knowlegde the UK Sales figures are not bad at all, when I was at couple of Lexus dealerships recently, I spoke to one guy who had a white BMW M3 with 700 miles on the clock, he was there to px it for a white IS F, I asked why are you swapping when you've only had your BMW for such a short time, his response was when you drive an IS F you'll know, he also said the 'rare' factor also appeals to him.