BOBs work and have a history of trouble free performance.
For touring I'd never use anything but a BOB.
For in town grocery trips I sometimes wish we had a 2 wheel trailer but out on the road BOB rules.
I agree, I use my BoB
Ibex for MTB offroad tours, road tours and the shopping. I use it with solos and tandems and have found the single wheel great for handling.
Two wheel trailer exponents will argue that:
1: You can carry more with 2 wheels......Why would you want to?, touring is about a minimalist approach, the Bob's capacity is more than enough, plus, you want to enjoy the tour by
not dragging too much around.
2: 2 wheels are easier to park....True, but I've never not found something to learn the outfit against, anyway a good quality kickstand solves that problem.
3: They won't tell you that the handling with 2 wheels is terrible at speed when cornering!!
If you are road touring, the BoB Yak is the ideal choice.