There's two somewhat good character moments (Johnny and Sue) but I wouldn't say that it's worth it just for those. I honestly wished I'd watched something else. For those 'must see moments' I just watch a clip on youtube. That's what I did for the Illuminati scene in Dr. Strange, and even that wasn't that great, and probably will do te same for Avengers Doomsday (especially after this). The last battle is a spectacle but it's not super thrilling imho. I really just wanted to see Galactus (which they did do justice, at least with character and design) but it was ho-hum at best. It's a shame because I did expect more from the most iconic story in FF history.

Edit: Watch Superman if you want a genuinely fun superhero experience with great scenes and character moments.