Is it just me, or does it seem there's been a spate of Bruce Haight puzzles lately? He had the first one at the A.C.P.T. this year, too! And - full disclosure - when I spoke to him at the tournament, I joked about his "stunt puzzles," and he hinted that he had another one in the pipeline. This, I'm assuming - using only seven letters - is it.
Sure, there are a few entries - I'm looking at you, ASSAI, ELEA, and REES - that are on the outskirts, but I rather enjoyed STALEAIR (4D: Result of poor ventilation), RARITIES (38D: They come along once in a blue moon), and the meta-clued ELLS (45A: The black square chunk in front of 55-, 60- and 63-Across, and others). And I think the four anagrams added a nice touch.
I briefly attempted to write a review using only A, E, I, L, R, S, and T, but didn't get very far before realizing that it would be rather tiresome to read, so I applaud Mr. Haight for the effort. One of these stunt puzzles every once in a while keeps things interesting.