I'm excited about the unlimited storage for $60/year, but being forced to use this app to take advantage of it is painful.
Like others have noted, it is slow - very, very slow. There doesn't appear to be any simple way to have it monitor the folder(s) of my choice and update them in the background. Nope. I have to initiate updates manually.
Shame on me, but I mistakenly thought that by sending all my thousands of photos, videos, documents, etc from my private archives would mean they'd be as easy to access as they were from Dropbox or my iMac, but truthfully, they might as well be on the moon.
The only thing I can say about Amazon's rollout of their new, consumer-geared unlimited storage is that it is a potentially incredible thing that is throttled and ruined by it's awful software.
I'm looking around and contacting 3rd party software makers to find out if they intend to support uploading and downloading from Amazon new service like they do for Dropbox, Google Drive, etc. So far no answers, but I'm still hopeful.