Joe beat me to the punch with his comment about his previous wide-open themeless! I had the same reservations going in for this one as ...
read moreJoe beat me to the punch with his comment about his previous wide-open themeless! I had the same reservations going in for this one as for the previous one: more often than not, quad-stacks will contain some neutral entries or even liabilities. But wow, was I impressed by the SE corner: ESTATE LAW, A LOT ALIKE, DATA MINER, BOXSTER = 4 out of 4! Rare occurrence for a corner this big to be this fantastic. It deserves a round of applause.

The opposite corner (NW) was more what I was expecting. TEAR APART ain't gonna win any awards, and ZEROES OUT would be fine or even an asset, if it weren't crossing LEAP OUT. I don't mind duplication of short words, but it's inelegant when they cross.
I'd rank the SW somewhere in between those two corners. Three strong entries — ADAMS RIB / PEAR JUICE / HOW GOES IT — along with MJOLNIR! Lovely. PHAT was a ding (outdated term), and AEON isn't great either since it's hard to clue in any other way but "___ Flux." (AEON is more commonly "eon.")
Similar assessment of the NE. AFTERCARE / BORN TO RUN / ALONE TIME / TD PASSES; those are all solid to sparkly! ARIE, BENE, not so bene.
Being able to talk about each corner separately implies that there wasn't enough interconnectivity, but the choked feeling of the middle didn't bother me as much as I expected. Plenty of ways in and out of each corner, even if every connection was tunnel-like.
Overall, a super-solid 66-worder. It's a feat that's hard enough to accomplish without additional points of difficulty, and it becomes an extreme challenge when you throw in quad-stacks. It definitely attracted some POW! consideration, winning points on technical excellence for its degree of difficulty.