If your M1 has only two mode groups with either three or five modes then the lighted switch is fine, but if your M1 has the Biscotti firmware (12 different groups) you’ll need to use a normal switch unless you modify the driver.
Those blue LEDs are pretty bright - I find them too bright to use in a torch that I leave beside my bed, so depending on how you use your torch you may prefer an ordinary switch anyway.
If you want to get really fancy you can even get a new silicone switch boot in the colour of your choice when you buy the switch.
Replacing the switch is incredibly easy once you get it unscrewed. I usually use circlip pliers, but you can also use needle nose pliers, strong tweezers or even a couple of small screwdrivers.
