The National Outdoor Leadership School uses these shelters in the Wind River Mountains (Black Diamond Mega-Mid). In my opinion, they best for 3-4 people. The per-person weight is light when the weight is shared. The larger ones have a sturdy center pole and you can actually stand up in them. Because even one person needs a certain length, you end up with a shelter that is larger and heavier than needed if you solo. The smaller ones that set up with a center trekking pole do not seem to be very practical in my opinion. Set up properly Tee-pee tents are very wind-worthy. Most have inner bug-liners that can be added when needed. As for "wasted space" you can use the edge space for your packs, so all gear can be inside. If there is not enough top ventilation and if you set it up too low to the ground, these shelters can get lots of condensation.