Quoted from andre060:
Hey vireland, did you ever install those angled target brackets? How'd that turn out? Seems like a really nice upgrade over the ugly clear plastic airball protector - curious how these worked out for you...
Oh, yeah. Sorry, I completely forgot to follow up. Yes, it stopped all the huge ball jumpbacks (like ones that would go over the flippers, etc) and the ball is nowhere near as wild hitting the targets. I removed the protector and it's working fine.
The only real negative (which is not related to the targets) is that protector kept the ball down longer as it started up the ramp, so without it, you sometimes get rocket-launched balls that go off the ramp and into the area behind Gozer. That ramp really needs a clear half-funnel on it to keep the ball on the ramp.
They're expensive, but they do work for the most part. A substantial improvement, and as such, I expect Stern will rip it off soon enough.