This remote had great instructions and videos to help with installation and compatibility check. Very simple install, took me about an hour, but I worked very slowly and made sure my wife approved of everything I was doing =-) But seriously, it installed easily and worked well.
The sensors let you know if your door is open or closed. Pairing with Alexa was pretty simple. I can even tell Alexa to open the garage from my car when my Amazon Music app is playing. My wife loves telling Alexa to open or close the garage. Now there is no need to have multiple garage door openers. No problem with the wall switch or the normal remote openers, they still work and cause no problems with the app or Alexa integration.
Now my neighbor is going to order one too.