I've only looked and read about them online, but if I really needed a 4 season trailer, they would be on my short list. As mentioned, the wood & 4 season construction make them on the heavier side, so it boils down to what size trailer do you want depending on what you plan to use for a tow vehicle. The closest floorplan to our 2201DS is in the Arctic Fox line and would add over a thousand lbs. to the dry weight. If money were no problem, I'd seriously think about a 3/4 ton truck and a nice Arctic Fox trailer....and if I were a fan of winter camping, I'd definitely look at the Nash or Arctic Fox.
You will see few negatives about Arctic Fox/Nash products and I think they are a good choice as long as you have the necessary tow vehicle and are happy with the floorpland and features you choose.