I had one of these a few years back, used it for hauling a couple of dirt bikes. It worked great for that (pretty light load w/ dirt bikes). What I found as the major weakness with the setup was the Wheel Bearings (or lack there of). (If this is the same model as the one I had, and it looks like it could be) It used Plain Bearings or "Busings" in the inner and outer hubs of the wheels. Not good for highway speeds (IMO). I made an improvement to the design by adding grease grooves on the ID of the Bushings and Drilling the Hubs and Busings and installing Grease Zerks. After putting around 2500 miles on the trailer hauling DB's, I noticed a small amount of "shake" in the Wheel assemblies.
If the trailer is going to do road duty, I would highly recommend a Bearing upgrade to some decent Axial / Roller Bearings. It probably wouldn't cost that much to achieve...
Good luck in your decision!