Prime is good for certain things, if you use it a lot or during the month free trial. I usually only buy fish stuff or normal stuff on there if it's marked down compared to the lfs or at least the same price at petco (petco will match prices from their own website though, done it lots of times). Some of the stuff is pricier than the lfs though so be careful. I did get a decent cake pan on there and some cookie cutters for like 8 bucks too haha.
Prime pantry is overpriced and not worth it IMO unless you can't find those ingredients at the regular or international grocery stores.
They do have a few good tv shows and movies too. Watched a few, they have an app for the xbox, all I have is that, hulu, and a really crappy tv antenna that I can barely pick up the news on. The signal in my apartment is crap, half the time my phone goes dead if I go in the kitchen, must be the way the building is constructed.
Prime is also good during water changes. Hue.