We have a 2017 25 foot Quantum.
We are very pleased with the layout and ergonomics of the rig. We also like the better quality cabinet fronts / finish. The main short coming for us is the bathroom is a bit tight on all levels but you may not have that issue on a longer model.
I very much agree that the build quality from THOR is (in our case at least) is poor. We love our rig except for the many many large and small issues we had to repair during our first year and a bit beyond.
I agree that finding as many issues up front as possible and having them repaired before delivery would be a huge step toward overall satisfaction.
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