The box has all 30 envelopes 29 of them are sealed one was open I have taken a pictures of the 12 cards from the one package that was open. Took picture of every round of 10 sealed packages. To avoid confusions.
I think the set as a whole is fantastic as far as card abilities and selection. The artwork is fantastic and the special basic land art cards are my favorite. It was a real treat to pull the pop out token cards as well out of random packs. And to literally top it off, the box topper treasure cards were some good pulls. S tier expansion.
The Lost Caverns of Ixalan is a cool set, nothing too incredible but has some good reprints and a chance to get some Jurassic Park cards. If you like Vampires, Merfolk, Dinosaurs and Mayan themed cards, it might be worth it to pick up a box or two.