Prior to buying our Minnie, I did a lot of searching online for reviews of Winnebago towables. Overall, owners have been very pleased. I did find a couple of postings of owners having some real problems, but that happens with just about every manufacturer.
I suggest that you just check everything you can, especially all plumbing fittings, exterior seams, caulking, etc.
We haven't had any problems (major) with our Minnie. Biggest oversight in factory was a couple of plumbing fittings that weren't tight....had a leak under the sink, which was easy to fix and the kitchen faucet had to be tightened.
So, give the new trailer a good inspection. Then, just enjoy!!
2012 Newmar Bay Star 3302
Blue Ox Avail
BrakeBuddy Advantage
2015 Malibu
"Get busy living, or get busy dying."
Andy Dufresne, The Shawshank Redemption