I used the alarm on my Amazon Echo this morning. For me it is a pleasant sound but different enough to wake me. The dangerous thing is it’s so easy to say, "Alexa, off."
I’m going to stick to my phone alarm where I can easily set multiple alarms and visually confirm the number and time that are set. I’ll use the Echo alarm feature more as a timer, to help remind me to check on things like the laundry.