I've had my Echo for several years and love it. Being "spied on" but a device is the least of my worries at this point in life. If they can be used to solve a crime then I'll meet the company at the door and happily hand it over. I think we've become paranoid in the environment we now live in.
I actually just bought the Dot for my neighbor, bought one of one of my sons and two Echo's for my son and daughter last year and they all love it.