Not sure why so many negative reviews
We installed this about a year ago using t2.micro free tier, set up 4 WordPress sites with custom domains (using an elastic IP, the domain management panel within WP Multi-site, and NameCheap as registrar) and have had no problems at all. Especially considering we basically had it all for the cost of the domain registrations, it has been great. We've never noticed any downtime or sluggishness on the sites.
Now that the free year is up, we'll stay with it and purchase a 3 year reserved instance, and still have a great price for a multi-site WP installation. The t2.micro instance has been fine for our relatively basic sites.