Thank you to everyone who has responded to my question. You all are wonderful at sharing knowledge! I received over 30 responses from libraries who have them (I'm sure more libraries do). All have received some type of basic training in using the machine and/or CPR. All agree that the machines are simple to use and talk you through the steps. Many of the libraries have local fire departments that have taken care of them: replacing batteries and pads, training. And here's the best part: no one has had to use one yet! We, unfortunately, have had someone collapse and die at the circulation desk (yes, it happens!) so are now planning on getting an AED with funds from our Friends. We don't know if having this device would have saved a life, but it is nice to be prepared. Thanks, Mary Russell Assistant Director Tamarack District Library 832 S Lincoln Ave, Box 469 Lakeview, MI 48850 989-352-6274 tamaracklibrary.org