I just recently became an Amazon Prime member. In January, as I was recuperating from a broken left shoulder and fractured left hip, I took advantage of a special offer to try this service for $79/year. Since I was homebound for four weeks, I thought having groceries delivered to my door would be a nice convenience.
Interestingly, I have not used the Prime Pantry feature yet. But I have greatly enjoyed the benefits of Amazon Prime Video and Prime Music. So far I have watched five seasons of Downton Abbey (yes, I am behind the times) and I have created a number of personal playlists to match my mood.