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I will say this, our X20E is our 3rd Jayco that we bought new. Overall solid build, initial fit and finish is decent but they do suffer from some quality control issues. Little things like doors that need latch adjustments, loose moldings, loose screws on some components, etc. From what I've read this seems to be across all product lines.
We had our last Jayco for 10 years and no real problems with it.