I can't say whether much has changed within the last year, but when I worked at FathomDB we had serious issues with EBS. You couldn't trust it. Odd things would

I can't say whether much has changed within the last year, but when I worked at FathomDB we had serious issues with EBS. You couldn't trust it. Odd things would happen like disks getting stuck in a reattaching state for days and disks having poor performance.