Hi Mike.
All the new defib machines made for use in public places are for the general public to use. They have voice instructions and picture directions on how to use them. When you turn it on, it tells you what to do next. They are now commonplace on airliners, in shopping malls, and major sporting venues. Extremely easy to use, and very effective. Used in conjunction with CPR, (which is now being taught chest compressions only, no mouth to mouth) they have saved numerous lives already. Having spent 40 plus years in the Fire Service, it is amazing to see the survival rate now compared to when I started.
Tom