Manual Power Windows?

[68Formula]

I was watching an episode of Bitchin' Rides, and noticed they had "power window switches" that looked like a normal crank-style handle. So searching for that product, I also came across this:

https://www.autoloc.com/catalog/Power-Window-Kits/Universal-Curved-Window/AUTPW4600/2-Door-Uwire-Universal-Power-Window-Kit-with-No-Switches

which basically connects a motor to the existing manual cranking mechanism.



Anyone use something like this? Seems like it'd be cheaper and easier than replacing the entire hardware, but wonder how well it work, especially on a 50 year old vehicle.