I just sold my 2013 Salem TT. I owned it for almost 4 years and it was a good trailer. I had a few things come up in the first year that were fixed under warranty and then it was pretty much trouble free.
Buying any trailer at this price point is a roll of the dice.... statistically, you're much more likely to get a unit with few/minor problems but there are always exceptions. These are what you read about on the net over and over again.
The best defense is buying from a good dealer that is close to you. Also, really look the unit over and do a solid PDI. In the end don't let a few internet horror stories scare you away from any brand.