She only speaks English for now.
My favorite features? The Shopping List is one. While I'm tooling around in the kitchen or looking in the refrigerator, I just say, "Alexa, add mustard to the shopping list", and it's there. Then there's an Echo app for iPad and iPhone, and I can pull up my shopping list and check things off anytime, anywhere. No more forgetting the list at home or forgetting to add something because I was in the middle of cooking and couldn't stop to write it down. Setting a timer is just as easy: "Alexa, set a timer for 6 minutes" or "Alexa, set an alarm for 6:45 pm".
"Alexa, what's the weather?" Or "Alexa, what's the weather in San Francisco?" Quicker than Googling.
"Alexa, play Willie Nelson", "Alexa, play Mozart", "Alexa, play Michael Buble"- whatever you are in the mood for, she'll play it for you using Prime Music or one of your own playlists.
You can set up a customized news briefing, then say "Alexa, Flash Briefing" while you're making your coffee and she'll feed you just the headline topics you've set up.
For me, it's worth the price just for the music and shopping list features.