I used a Master Tow dolly for 9 years and only stopped when I purchased a 2009 Chevy Silverado as a towed vehicle to allow taking along the golf cart or motorcycle.
My experience with the dolly was generally positive and seemed appropriate to the price of the initial purchase. I found that the tires will wear quickly if the pressure isn't kept well into the high end of the sidewall ratings. I replaced the lights with LED's and never replaced another one in 7 years. Before that I rarely made even a short trip where I didn't have to replace at least one light at a cost of $8-9 each.
As for trying to get some feedback from Master Tow, I never found the need so can't expand on that.