My FLGS didn't get their shipment, so unfortunately I wasn't able to get the full book. I did, however, purchase the monster package on D&D Beyond (because, hey, monsters can always be used in hombrew in the meantime and in the future!), and I really like the various new monsters available. I'm very happy to see a nice selection of nasty plant foes, which were lacking in the MM, including a lot of my favorites that hadn't been updated yet to 5e - it will be nice to surprise my players with assassin vines or yellow musk creepers/zombies. Also, there are three new CR 10+ monsters (not including Acererak himself), which is at least a small step towards getting more higher-level foes...