I've got an older version of this trailer with the hitch that clamps onto the chainstay. Other aspects of the design may have changed too (about 2 years old)
It's been well used by me and has occasionally taken more than the recommended maximum weight.
I had to line the insides of the trailer with plastic sheeting as they are just fabric and depending on what was loaded, the sides could rub against the wheels.
The wheels wobble slightly due to the way they fix to the axles with split pins. Unless I've got a faulty one and don't know the difference
I didn't know much about trailers before buying this and still don't now - I'd look for one now that didn't have this as I think it reduces the efficiency.
This problem might be a side effect of it's ability to fold flat for storage very easily.
It does fold and store away very easily indeed.
From using it I'd say it's better suited to shortish journeys than long distances.
Hope this helps.