I recently received the heavy duty trailer and I really like it. It comes disassembled and you have to put it together. It wasn't that easy to put it together because the manual is of really bad quality. It's one small sheet, printed in black and grey colors and you are not able to see how it should be put together - but I did it in at least 1,5 hours :D Some screws were missing but I fortunately had a bunch of screws lying around. There are two areas where the trailer was a little bit rusty. I guess it was a bad painting as well as bad storage afterwards. One screw just didn't want to hold tight within one thread.
Unfortunately the LED kit just didn't work and I was too lazy to find and fix the problem - just because if should work without fixing a problem.
What I really didn't like was putting the bead lock wheels and tires together. I have no idea why they did it that way (screw from inside and nut from the outside) because XTRASPEED has some really nice and great working bead lock wheels.
All in all I like the trailer with it's minor issues. We will see how it works when getting into dirt :) It's almost 3 times cheaper than the RC4WD pendant.