I used this for several music festivals (Glastonbury, Download etc) and so it carried moderately heavy gear over rough fields for some distance.
The good part is that it's light, folds up in a nice compact way and it's cheap. The basic frame seemed to be OK - extends easily and the tray folds up out of the way for storage. The design is let down catastrophically by the cheap plastic wheels which buckle under load collapse in no time at all. The simple expedient of the manufacturer using metal hubbed wheels would have made this usable. As it is I'd avoid it like the plague: NOTHING is worse than having a trolley fall apart in the middle of a field in the middle of nowhere and having to haul 30Kg camping gear a mile.