I am obsessed with these switches. The LED ring is super bright without being obnoxiously so, and the audible click and tactile sensation from engaging the button are very satisfying. Very happy with the build quality, fit, and finish (including durability). Consistently good results across nine different switches I've wired up now - not one has presented any issues or failed in any way. Even when I made some wiring mistakes early on, the switches sustained no damage. They are perfect for a semi-finished, dark space like a basement or a garage. If you get a 19mm, that's a perfect fit into a 3/4" knockout on a standard J-box - just pop one in, install some kind of small downlight fixture to the face of the box, wire the switch with LED on normally closed or always closed, and now you've got a light that's easy to find in the dark and easy to click on and off. To replace existing switches, I use a 30mm version - beware you'll either need extra deep boxes for these (at least 2 inches) or extension rings; there are examples of both in the attached video.
30mm Latching Push Button Switch Angel Eye LED Waterproof Stainless Steel Round
