I bought a 16 foot angle top dual 3500 axle utility trailer from them about 8-10 years ago. It didn't have the finest finish and only maybe 2 coats of paint, and the wiring was simply done, but the design is sound and the build has been sufficient. I have loaded it up with 4000lbs of tractor and implements many many times and taken it out on the interstate and it has done just fine. I also have hauled probably 2-3 tons of rock with it before, which was a little on the overload side, but it worked. It also hauled my Honda Fit once, too, and it's about 3000lb loaded.
I added a couple of weld-on, tilt up 5000lb trailer jacks on the rear corners so I can lower them to make it much more stable when l am loading and unloading the tractor. They make it a HELL of a lot easier to change the tires out too. You can lift the entire trailer off the ground with the three jacks and remove all the wheels at once and take just the wheels in for new tires, or replace one on the road even with the trailer loaded much more easily.
I neglected to paint the wood regularly, and it did start to dry rot in a couple of spots after a few years of being stored outside, but a Saturday afternoon and some quality time with a cordless drill and I replaced it with some new 2x6x16 treated wood when the time came.