The only experience I had of one was answering a Pilot add a few years ago. The guy just laughed when I told him how heavy I was (12st) - too heavy. I think you also need to be vertically challenged to fit in it. But don't let that put you off, it may just have been this example that was so limited.
Can't you find out the actual figures from the vendor.
Very impressive performance though. Doesn't it do 200mph?