I have one from Sitka, one from Tangle Free and another from Rig 'Em Right. If I am in a small or crowded blind or layup with limited space I prefer the small one from RER. The Sitka Full Choke bag is nice if I need to carry a lot but it's kind of overkill most of the time and I find myself carrying more than I need simply because it can hold it. The bag from Tangle Free Flight Series bag is your typical blind/shell bag that has been made by nearly everyone for years now, it gets the least amount of use and is usually a loaner for buddies or newbies that come along.
Rig 'Em Right Lock and Load Blind Bag