In descending order of importance all the way to nitpicking:
1) Pole-tip-up design not good in windy condition as the fly can easily get damaged (it's 20d silpoly).
2) As I recall the inside of each peak was (i) Reinforced with some kind thicker plastic (ii) Had a strip of webbing as a 'backstop' to the pole tip and (iii) another strip of webbing with a grommet to hold the actual pole tip in place. I found it difficult to keep the 'backstop webbing' over the pole tip so usually the tip was usually in direct contact with the reinforced fly which is not as designed and a potential failure point.
3) Because the tips were up the handles were down. I had the 1P version which has quite a narrow inner. Because the handles have little purchase on the ground I would often accidentally push the poles out a bit, I found this pretty unavoidable if not on absolutely flat ground.
4) The same 20d silpoly as used on the fly seemed too thin for the floor, although I never had any damage.
5) The inner's pockets were poorly stitched on and stuff would fall out of the overhead pocket as was too loose / saggy.
6) The zips leaked on me the first time I used it. I'm not sure if water actually dripped on any of my stuff or it just rolled down the zip towards the bottom because it was 2am but it did get through. They're billed water resistant, not waterproof, so fine. But one of the reasons I like MLD stuff is that there's a flap as well as water resistant zip (I think they see a lot of sales in the UK).
7) The included titanium V stakes are weak. I bent one on my first wild camp by mistake. I know they're Vargo and titanium so top of the line, but still I'd have preferred a standard aluminium Y-peg for example.
8) It says it's fully seam sealed on the site (
https://durstongear.com/product/x-mid-1p) but it's not. Unless something's changed the stitching attaching the zips isn't sealed and will leak if you don't seal it. I understand this is probably a cost issue but the main thing that bothers me is that I wasn't aware of it before water was coming in because it said 'fully sealed'. Maybe it was in the instructions that came with it I'm not sure but I can't see it on the site.
9) Inner tent is mesh, not half solid or solid options. Another cost issue probably and to be fair why bother with the hassle when there's such a small market that would know or care about this.
Don't get me wrong there are lots of positives about it, they're in every review on the internet so I won't repeat them, but I found some negatives. In general the geometry is great and it's sold at a competitive price to its peers. It's obviously incredibly popular and doing well but not for me.