D. N. F.
Very hard. We were booked and on the move today from 9:30am until almost 9:30pm, but before and after that, we spent well over an hour on this thing before getting it all filled in, only to find that we had a mistake that we just couldn't find! Our "Men in Black" agent names are a bit rusty, so when "Agent B" seemed as good as any other letter, and "Do the bob" seemed like it could have been a terrible, but at least possible, answer to 14D: Cut it (DOTHEJOB) (could have been talking about hair, right?), well... that's what happened to us. We also weren't entirely sure of the ESAI (8D: Morales of film) (When will I remember this!?)/DIETZ (30A: ____ & Watson (big name in deli meat)) crossing, or the meaning of HEELERS (44A: Many party hacks).
We said just yesterday that we like a challenge, but when you struggle and struggle, and the answer turns out to be PLACENAME (31D: Boson, Chicago or Kansas), it doesn't quite feel worth it. ALASKANKINGCRAB is 35A: One with long, luscious legs? Luscious? Really? Yuck. And speaking of yuck, MILK, MAMA, and FETUS weren't the greatest trio.
I don't know... I don't want to just slam it, I guess, but we didn't love it. Perhaps others will comment with things they liked about it. Me, I'm going to go rest, and look forward to tomorrow's grid.