It's biggest use in our house to date is my 8 year old has it spell words for her when she's playing minecraft.
I'm hoping it gets a lot more useful over the next year or so, and for a $100 christmas gift for my wife, if not, no real loss.
I like it. It's not SUPER useful yet, but it's an easy way to listen to music etc casually, and makes a pretty kick ass alarm clock. I switched from apple match to amazon cloud play after getting my echo.
It's basically a bluetooth speaker, with the amazon cloud shit thrown in for free.