Mostly pretty good. I had total confidence in the Jaguar system (but maybe I was too inexperienced and trusting to know any better!).
The Hawk T2 GPWS is also good. Occasionally you will get erroneous warnings mostly on entrance to valley systems (the ski toe looking out the front will react to valley walls and such). Many of those photos from the mach loop you see are accompanied by in-cockpit "pull up" warnings!
BV
