It has been just over 3 months since the global launch of Amazon Video; and I have been a subscriber since then - initially to watch The Grand Tour - but there have been other things that have kept me paying.
I have mostly been watching TV series but have also watched a few movies - even though I find that selection rather meagre. At least in SA. One of the interesting experiences was to see the difference in content between South Africa and Reunion - some content I had downloaded on my phone disappeared, while I had access to other content.
I also find it strange that some of Amazon's own content is not immediately available - even if it is for an additional cost. Manchester by the Sea is the example that comes to mind, but there are other series that I have heard of but not seen on Amazon. I expect that will change over time - or at least I hope so.
Technically, I have had few issues with streaming HD content on what is still a fairly slow 4 Mbps ADSL line - and that says a lot for Amazon's streaming codecs. I would prefer if my Nvidia Shield TV cached or otherwise downloaded content that is in my queue - but except for a few occasions, haven't had cause to complain.