I just received my first Echo product, a second-generation Echo Dot. I just couldn't resist the price and wanted to try out the technology. I keep it at my office, where I have long had a nice pair of Audioengine powered speakers with a Logitech Bluetooth input for playing music from my phone. The Dot easily found the Bluetooth device and began playing my Amazon music collection. When I saw that I could enable Music Unlimited for a 30-day free trial, I set that up, and so far I really like it. I have asked it to play some pretty obscure albums from my collection (some of which I don't even own anymore and haven't heard in years), and it hasn't failed me yet. I can also just say, "Alexa, play light jazz," and I get some very nice, soft music for office work. I've only been using Music Unlimited for a couple of days, but at $3.99 per month to get it just on the Dot, I'm thinking I'll probably keep it.