I had a go on an off road one fairly recently (maybe a year or two ago at most?) And it was pretty fun! A comment above says they aren't good for cities becaus

I had a go on an off road one fairly recently (maybe a year or two ago at most?) And it was pretty fun! A comment above says they aren't good for cities because they're too fast for the path and too slow for a cycle lane, but I think they're great for country lanes and open grass.