I received the kit and the blue LED was not working. I received a second set but came back and the blue led was wired the other way around and the orange led didn't work. Power LED replaced with a pair on the other side
I bought them for a homemade battery powered toy. You have a very nice click. The insert with LED and resistor can be easily removed and. For myself I soldered resistors to better control the brightness at 3.3V.
I needed them to build my own custom PLC test block. These are red and green buttons on the bottom tier with 5 pins on the blue back below. I like this as both connections for the internal LED are separate from each switching mechanism and the switch has both normally open and normally closed contact options. For a PLC test block you can have 2 different switch inputs and 1 LED output for that one part. The bottom line is that I control the light separately from the switch via a PLC. The switch