To me this product is really a great design and something that I definitely intend to try out sooner than later. Years ago I bought the original aluminum flippers that were offered by Pinball Life and they were really great. The wimpy plastic flippers we use twist and bend with a minimum of force and most of the time have breaks internally when inspected. The original Pinball Life ones worked great in fast games like AC/DC and Metallica and they definitely made my shots more accurate. Definitely. When I sold those games, I stupidly left the metal flippers in them thinking I could always buy more, but that was not the case.
A while back Pinball Life commissioned some new metal bats and I ordered some. Unfortunately the design was TERRIBLE. The bats were loose on the shafts and they were not hollowed out so they weighed way too much. Pinball Life refunded everyone who ordered and they are done. I ended up pinning my flippers to secure the shaft, so I could use them and test them out. The extra weight didn't affect the shooting of the ball at all, but it did affect the speed at which the return spring brought the flipper bat back down and caused a slight bounce at the bottom. The original metal flippers from PBL were much lighter and DID NOT DO THIS. They played just like regular flipper bats as far as return speed.
So now we come to this new product. First thing I noticed is they are nicely machined to remove any excess metal and keep the weight down. They are completely hollowed out on the bottom side and if you look they are even trimmed off on the bottom to give extra clearance on the playfield and avoid any chance of dragging. I would be buying the bushings at the same time, because the normal nylon bushings also bend a lot. So this new design passed all of my sniff tests when I first saw it and I even sent some questions to the designer which he promptly returned.
For what it is worth, I am also an engineer whose job it is to review new designs and design changes. I definitely have no connection with this company, but I do plan on purchasing these flippers for one or two of my Sterns. After testing them for a few months, I suspect that I will be purchasing them for all my newer games. As mentioned above, these games cost thousands of dollars and the part that controls the ball is a $5 piece of crappy plastic. To make the dreaded cargument, that is like having some old bias ply 78 series tires on a new Corvette.