At my work we have six transfers, 2 reliance (one square tub and one round tub), 2 superiors, 1 likens and 1 wesco. The reliance and wesco round tubs are identical and I didnt even realize that mine wasnt reliance for about a week. Those two are miles ahead of the others.
The likens are well built boxes but they have way more parts than they need to and seem way over complicated after running the reliance style. The superiors are junk, they are the lightest of all of them but they do not last, all four of the boxes have had to be straightened a few times, the trailer boxes had bowed out so much that they wouldnt fit in the truck. I also dont trust the tail gate to hold the trailer box in while you dump. The air drive system on them is nice though. The reliance and wescos are my favorite of the bunch but that would be different if we had a rouge setup, after learning more about them i would never buy anything else.
One more thing about the superiors, they use channel to build the tounges and both of our trailers have had the tounges collapse while trying to back up a hill. I know your not supposed to back a transfer uphill but we work in alot of tight, steep places and do alot of backing up, we have never had a problem with any other trailer.