OF: I'd sit in one first. It is amazing how the car specs tell just 1/2 the story. My Caterhams are virtual twins of my Birkin, yet the leg room, arm room, visibility of the gauges, proximity of the gear shift lever, height of the windshield, placement of the mirrors, usability of the seat belts, comfort of the seats, seat back angle, etc., etc., was all different.
As I recall the Ultralite places gauges in the center, and mounts the steering wheel low. Or maybe it just depends on the builder. My only point is to try it on for size first, rather than buying via internet. Definitely worth the price of an airplane ticket, IMHO.
All that said, this one looks pretty wonderful and at a very reasonable price.