Obviously not speaking from experience there buddy.
I have been using a road legal Quad for a while now and have had no problems with tipping over etc. They can be a little unstable but if riden regulally you learn to ride them better. Too many people jump on a quad, fall off then blame the quad for being unstable. Your lean to corner on a motorcycle and you also do the same on a quad. You shift weight around to keep balanced, I can corner at around 60+ on mine without fear of flipping it. Took me a short while to get used to it but its second nature now. Great fun, after all my Quad is my main means of transport and as far as confort is concered, I can do a 60 mile trip with no discomfort at the end of it.
You can ride a road legal quad on either a Full car license or full bike license. Below 21 years old you can ride nothing bigger than a 350cc, above 21 you have no cc limits.
Insurance is'nt too bad either, I pay £250.00 fully comp through QuadSure (Adrian Flux)
Regards
Chris
cornish-quads.com
Me on my road legal Apache RLX320: