WWZMDiB 6pcs 360° Rotary Encoder Digital Potentiometer with Push Button 5 Pins and Knob Cap for Arduino (Pack of 5) - EC11

Fixed my radio after they went bad, Great product

I used them in a synthesizer project. They work perfect.

Solid rotary encoders, the contacts are a bit flimsy but once permanently installed there's no issues. They don't work well with breadboards for prototyping due to the length of the pins, but you can hold them in place for a quick test. There's only about 10 divisions on a full turn, so they're not as useful for finer controls. But perfect for a volume knob application where a full turn would be 0-10. Buttons aren't super clicky but they do work reliably. Knobs are nice and fit snugly.

They seem to be nice

I believe this may well be a good encoder, but it's so frustrating to actually use it for prototyping. I'm used for the contacts to be a piece of square metal that fits snugly into the breadboard. These contacts are only about 1/3 as thick as they are wide. So essentially you'll want to solder them into something from the get go. In my view this loses half of the desired functionality.