I have been towing with Roadmaster tow bars for the last 16 years. have never had one problem. I have always had roadster and airfare one brake systems on my towd. with breakaway system. Breakaway system has never been used so i would say tow bar system is very good.
I have towed a 1998 Honda accord, a 2009 Lincoln MKX and a 2005 Honda CRV.
I used the roadster tow bars with my Beaver diesel pusher and now I down sized to a Coach House class c and use the same tow bars. work great.