I have the Burley Solo.
http://www.burley.com/products/trail...tml?p=Solo&i=1
Burley Flatbed
http://www.burley.com/products/trail...?p=Flatbed&i=7
and Wike Woody Wagon
http://www.wicycle.com/kit.htm
The Flatbed sees, by far, the most use and works well with any of my bikes.
The Solo tows as easily as the Flatbed and I imagine the Nomad would be much the same. I use it when hauling the youngest or if I have a load I want to be covered. I really like these trailers and use the Flatbed almost daily when working as a private contractor.
The Woody Wagon with a canoe and gear on it make for a looong and heeeaavy trailer. That, and because of the receiver hitch that bolts to the seatpost, I only use this trailer with my Townie3, my most inherently stable bike.
All of these are two wheeled trailers and width is a problem, but only when I strike off into the boonies where there's no road and sometimes not even a trail.
The BOB trailers, I don't have any experience with.