TLDR: Awesome switch with good wiring schematics provided by Schaller you can easily follow.
Watch out for overtightning the screws on some guitars!
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I bought this switch to use the HH7 wiring, having 3 coil split sounds in the middle positions and full humbuckers on the outside positions. It delivers that sound perfectly.
I followed Schaller's wiring schemes from their website, and modified them to my needs. I found the notation of the color codes of the pickup wires on their website pretty confusing (and probably not accurate?), so I decided to meassure the pickups myself with a multimeter following a simple YouTube tutorial. After finding out which wires of the pickups correspond to which coils with which polarity, it was a piece of cake to color code the connections according to the wiring scheme provided by Schaller.
The switch is pretty clicky, but not super stiff as I would have liked, but it still works really well.
The gold plate contacts for soldering are really cool and makes the wiring super simple to follow and solder without issues. I also prefer the connections being oriented on the side, compared to regular switches.
The only issue I've encountered is the screws that come with the switch. WATCH OUT and don't overtighten them too much!! I managed to crack a little bit of my gloss finish on one of my guitars when I was tightening down one of the screws (I wasn't even applying too much force, just trying to get the screw flush with the body). Other than that, the installation was fine.
I can highly recommend it and I will definitely be buying more products from Schaller in the future!