I own both an ATR and a Military. I have had the ATR from the first production run, and just received my first Militray about a month ago. The ATR is great. I draw similarities (in materials) between it and my large Sebenaza (which is the best folder I own).
However, I simply cannot put my Military down. For the money it is an absolutely fabulous knife. I have a very cool Vess leather sheath for it, and I absolutely am thrilled with the construction, sharpness and light weight of this knife. I will always have a Spyderco Military.