ThatPhilBrettGuy
GT Owner
There's a trick to getting them off the line, basically using the anti-stall you get you moving then go for it.I drove one and didn't have any problem with the leg and knee room, but I am much shorter than you are. I don't know about the headroom though since I drove it top off. The clutch is pretty tough for me to get used to and I didn't want to fry 25K, killed the car off the line too many times. Once rolling very easy to drive.
As others have said all the owners do is talk about clutch's. As I live in the centre of London that ruled the car out due to our traffic issues. It's a lovely thing apart from that and very quick.