"We've bought a lot of these, as they're some of the best value ones available.
The castors roll over some pretty rough surfaces with ease, even when stacked 5-6 feet high. The dolly material is much stronger than other variants we've tried, which tend to crack if bashed or heavily loaded.
Because the skirt is high and goes all the way round, we often put a 600x400mm sheet of plywood inside. This still allows you to use the dolly for Euro Containers, but you can also stack other smaller sizes of box and crate, which is a big help around offices and workshops.
It would be nice not to have to fit the castors ourselves, but I'd rather keep the price low. Besides which, it's something which can be done quickly while chatting during a coffee break!
The only thing to watch out for is that some have arrived with castors which are the wrong size for the holes in the dolly. This makes a big difference in strength, but Screwfix changed them immediately, so it wasn't a problem."