I've ridden these in the lot behind our old Tucson shop. I was 26 or so and they were brutal then. Butt the front wheel against the cinderblock wall of the shop and it just climbs to vertical and keeps scratching. Ours had a chainsaw motor instead of the 4-stroke anchor. There is a lot of body english & muscle involved in riding these. Leno (god blessem') was barely up to traversing a small dirt ridge. These fall squarely in the "tool" category.
A buddy of mine bought one on a lark and I spent a few hours on it, frankly I didn't think it was much fun and neither did he, I think he re-sold it after a month or two.
That being said I was riding a round of the Suzuki Dual Sport series in New Hampshire a few years back. The route was wet and muddy, and where it was dry, nothing but bowling ball size rocks (baby heads). At one snotty climb there had to be 300 bikes stuck on the trail, Rodney Smith who was a gold medalist at the ISDT that year and the Grand Marshall of the ride was even having some trouble. While we were waiting for our turn to go up a guy on a Rokon, decide to cut his own trail through the woods, that SOB went up that wet, mucky hill like he was riding across a dry parking lot.
The best part was that he literally bulldozed a trail thru the undergrowth and a bunch of us were able to follow him to the top. The last I saw of him he was headed down the trail dragging about a 100 pounds of "wait a minute" vines behind him.