One of the finest Thor stories ever told in this or any other realm, this issue only gets a 9 because it doesn't include the next two issues. Featuring a writer that's been involved with the title since 2012, and an artist that can make Mangog menacing without changing the original look of the character, this is how long form storytelling should be done. It is indeed doubtful that the Grecian myths would still be with us today if they had been rebooted over and over. Picture Cerberus, if you will, depicted as a fluffy three headed pussycat.
Actually, with this creative team, that could work...
Anyway, it's not too late for you to start picking up this book. Maybe too late for Jane Foster, but you've still got a chance to jump into a run that people will be talking about for years.
Highly recommended for fans of Thor, Odin, Freyja, and the rest. Not so highly recommended for fans of the Rainbow Bridge.