Meh. The theme material is nice enough, and HERMITCRAB (11D: Creature that adopts a seashell) was a nice entry (though obviously-clued), but I just never cottoned to this one. Answers like RADARS (5D: Some control tower equipment), DINOS (24D: T. rex and others), DOS (58D: Opposite of no-nos), STAN (54D: Persian suffix that ends seven country names), ATAD (47D: Slightly), and others, just seemed kind of blah. And that revealer, using the only numeral in the puzzle, well... David Steinberg had a puzzle earlier this year that only used one number, so I wasn't too, too surprised by it, but, well... it just didn't do it for me.
On the brighter side, although I usually dislike the referential clues, APOGEE (15A: Farthest point of a 50-Down) is a nice word, and I'm sure that frequent-commenter Huygens will enjoy that pair. 2D: Corny things? (EARS) is kind of a cute clue, but after that, it's kind of hard to find anything that isn't just run-of-the mill. It's not especially bad, but it isn't much more than that, either.