FWIW, I've had good luck with it, albeit mostly beyond 2,000 yards where they couldn't target a weak point (55 kills this tour, at the cost of 3 deaths, of which 2 were by bombs). It can kill a Tiger II, and costs less than half as much.
I do get the impression that AH models cumulative damage to armor, however (is this realistic?). Thus once the opponent gets the range and your Jagdpanther is pinged, especially if it a large caliber round, you probably should reposition.