I've had an MLD Supermid out in extremely harsh winds, to the point where I was holding on to the center pole most of the night, praying to the wind gods to spare me my shelter. They did! The Duomid has a slightly lower profile, so I would expect it to perform even better. I really put the Supermid to the test that night, and now have no worries whatsoever about wind, rain or snow-loading for that matter. The beauty of the pyramid shelter is the (high)space to (low) weight ratio.
If you are under 6', an inner net will work for the Duomid, but they are designed to be single wall shelters that provide ample space at very low weight. You can cook inside of them, dig out the bottom if camping on snow, pitch it high in good weather, low in stormy weather, etc. For a small fee you can get remove-able perimeter netting sewed onto a pyramid shelter, offering the best of both worlds. I've read that plenty of people make an inner net work for them, but for me it wouldn't work and takes away the most beneficial aspect of a 'mid. If you are married to the idea of a 'double wall' tent, the TT might be a better option. If you want something to cover all seasons, and are open to the idea of someday using a single wall shelter, the Duomid is a great choice!