I have not ridden a Spyder but have ridden with those who do. Those things look like a lot of fun but not in a motorcycle kind of way. I would happily own one if I had the spare cash lying around. On one of my rides I had one behind me in the twisties. On this road there is one bend that is twice as sharp as the others and it can catch you out. After going around it I looked in my mirrors to see the Spyder come whipping round that bend at speed. The front wheels were planted but there may have been the tiniest rear wheel slide. Still, it took that corner much faster than I would want to on a bike. I think they are tiring to ride though. Where we counteract the centrifugal force by leaning into the corner those guys just have to hang on.
I took my ERC on my MP3 in order to get my 3 wheel license (a workaround arranged by the WA DOL). I was the only one who had to do the u-turn in the 20′ box as I was the only <500cc bike there. That seemed like an arbitrary distinction but all those hours of practice paid off and I can do it within that space with feet to spare. The hardest part I found was the swerve. I couldn't help but notice everyone else was already leaning into the swerve before they were through the gate. I didn't have that luxury as the gate was not much wider than my wheels. I made it okay but I certainly had to watch my speed, much faster than the minimum allowed would have been hard. Interestingly the instructor told us the cops practice this with large cones (ie. 2' tall cones). This means the back end of the bike has to clear the cone as well, not just the 2" width of the tire.
Other interesting part was on the emergency stop in front of the instructors assistant where I had the following conversation.
IA: Are you in first gear?
ME: ?….It’s a scooter.
IA: Yes, but are you in first gear?
ME: ?……….It’s….a….scooter. It doesn’t have gears.
IA: Oh, well I guess you have it easy then.
And I know some older scooters have gears but come on.