I think you'd find the X-Mid is a high quality tent. It's built at the same factory as MSR and uses high end components throughout (e.g. ITW buckles, YKK AquaGuard zips instead of basic ones etc). The low price is only because they are sold direct (no retail markup). You can search the 144 actual user reviews on Drop for "quality", and I think you'd find good things said:
https://drop.com/buy/massdrop-x-dan-durston-x-mid-1p-tent/reviews?search=quality
