i have, feel it's reasonably priced, and i've been pleased with what i've gotten for the money. i wanted it for exactly the reason of "don't wait until after you've got a serious problem".

black belt - 20 years

This! Far too often I see worthless comments because people were taught in school "you should comment your code".

I've had several Sonos components for years. They have worked flawlessly for me.