offers fast easy inner set up needing only one person which can stand alone without the fly in good weather and allow good views of the sky and ability to close up all windows and doors for wind chill or light rain protection (will need either a 2.4mx2.4m light tarp or larger to clamp to the poles if it rains - or put the fly on). Hopefully an forthcoming updated version will allow guy out of the inner tent for better wind protection without the fly.
fly offers great wind/rain protection as well as providing the Blockout layer so you can sleep during the sunny days without getting too hot and the nice vestibule and rear awning.
tall enough to stand up in so no more having to get changed while lying down or sitting
vestibule is large enough for a good sized chair and a table providing shelter from sun/wind/rain and an area to cook in
large dual doors front and back - great if the wind direction changes and you close up one end, and provides a valuable secondary escape option if there are issues in the vestibule such as a fire or a snake.
all windows (except ceiling mesh) and doors are mesh with an inner fabric to zip up for allowing excellent ventilation control, full privacy or wind/rain protection even without the fly (do need a tarp to protect the ceiling mesh though) - even without the inner fabric zipped up, someone would need to stand within 2m to see you sleeping on a mattress on the floor.
mesh is No-See-Um so not even the biting midges/sand flies will get through, and they are hard to see into the tent when the inside is dark (as it usually is even in day time if there is no direct sunlight coming in) offering extra privacy protection, even if someone uses a torch outside
good quality waterproof bucket floor
can withstand strong winds IF the fly is on securely AND you guy it out well
rear awning is a nice touch (although it does collect rain water, and mine leaks a little into tent doorway if it is open) and can be supplemented with a tarp to wall it off in winds
NB. there is a smaller, lighter 3P version but it does not have Blockout nor a large vestibule. Coleman have a 3P blockout version but no rear door, mesh is not midgee-proof and floor is a noisy crinkly material.
NB. Coleman have a similar tent, the Northstar Instant Up 4 Lighted DarkRoom Tent but this does not have the nice large rear door, ceiling does not have mesh so can't see the sky, and the mesh is ultrafine but may not be No-See-Um midgee proof
NB. there are larger Fast Frame tents but these require two people to set up and are obviously bigger and heavier