I had a 27 foot gooseneck Moritz that I put over 400,000 miles on it. I bought it used. It carried the weight well and the paint held up well. I was rear ended twice while I was towing it. The damage appeared months later as the small cracks were fractured and the water started to rust the damaged welds. I was hit hard enough that it broke one of the plates off of the hitch under the truck body. I put several thousands of miles on it after I was hit. It was still straight when I sold it.
It was a 14,000 pound trailer with the torsion axles. They gave a good ride. I did have to replace both of the axles and they are a lot of money to replace. I now have a Big Tex and it is a piece of dung. Never will I buy another one. It is the standard spring and axle. I have had 2 springs and 1 set of u-bolts break off the trailer. There was no damage showing before they broke. Three times this trailer has left me stranded. And yes I use it but I do not overload it. I have the scale tickets to prove it. I will not carry over 10,000 pounds.
However I have not found any one that will say they are impressed with the new trailers of any brand.