I just completed my ME course on Sunday. I passed the driving skills test with fairly little difficulty, riding one of their 250cc Suzuki baby-Harley knock-offs. I tell you, one of those Can-am 3-wheelers would avoid the main reason for failure (dropping the bike), but it might be awfully difficult to make the 2 U-turns within the 20x40' box that the test required (that's 6x12 meters). That was the only really difficult part of the test (and the only place where I lost points- for putting a foot down
).
Honestly, other than how to drive and shift a standard motorcycle, I didn't learn anything at the course that I hadn't already learned in 6-months of riding my 50cc out on the road (things like lane position, situational awareness, braking in a curve, proper cornering, etc.), OR learned from an internet forum (things like wearing proper gear, pre-ride inspections, basic maintenence). I could see that others in the course (the true Newbs) were learning more, and if you want to jump straight from 4-wheels to 2 (especailly with a 150++ size motor), it could save your life. But so can common sense and a healthy respect for the risks you're taking.