I've had three 597's. One was a reliable and accurate gun that I regret selling. The other two were complete crap: totally unreliable, multiple problems and malfunctions and, worse of all, terrible accuracy.
I've had two 795's, and a friend has one as well. All three have been stone-axe reliable, acceptably accurate, a pleasure to own and use.
I would never throw away another dollar on a 597.