I'm biased, but here is my opinion.
They have plenty of room for 4, if used with a stove it would best be a 2 person.
The nest adds a lot of weight , but it cures peoples concerns over bugs etc. and is still pretty light at about 6 lbs for the combo.
I personally prefer a tent that the edges go to the ground (or further), with a screen integrated for ventilation, but that's just me.
Kevin