So I decided today to swap out the front Angel GT on my Monster 1200. About 1,400 miles ago when I got belt changes and oil change they said it was at the wear bars and recommended changing it. Seemed like it was getting a little bit of a pointy profile lately, which affected handling feel. Tire had 7,268 miles on it, which I think is pretty darn good. The new tire is an Angel GT2, which has a different tread pattern for whatever reason.
The rear Angel has 4,810 miles on it and looks to have quite a few more miles in it. I am not doing track days or pushing it very hard, but even so am surprised at the mileage. I recall replacing rear tires on my old Tuono at 2,000 miles because they were totally shot. That was maybe a Pirelli Corsa, not sure it's been a while. No doubt it was a stickier tire.
Anyway, I like these tires, at least for normal street riding.