This video was filmed to show you the South Col Tent, made by
A four season tent, it seems to have all the best features, especially the double door on each end. Anyone who has hiked with a partner for any length of time will tell you how sweet it is to each have their own door and vestibule for those cold rainy days. The double doors also provide flow through ventilation.
Its really nice not having to climb over your partner and sleeping parallel to your own vestibule is much better than the tunnel type configuration where you crawl out at the head or foot end.