DRINK DRINK DRINK! And then DRINK DRINK DRINK again! Mickey and Pawel pack six toasts into their grid. I was confused by the revealer, especially since there was no "when doubled" qualifier, to make a total of six instead of just three toasts. But who's counting?

Neat that they crossed TO YOUR HEALTH / L'CHAIM and DOWN THE HATCH / KANPAI, so fortuitous that this worked out. Opportunities like this don't come along often, so it's fun to see when the crossword gods shine down upon constructors.
The opposing viewpoint is that even if those intersections are possible, should they be used? I miscounted themers the first time through, glossing over L'CHAIM and KANPAI — placing two short themers vertically can mean that they blend into the fill. As neat as crossing themers can be, I might have preferred for all the themers to be horizontal, as they would have stood out better for me — maybe shifting L'CHAIM roughly to where CASINOS is.
The crossing answers also cause grid inflexibility, a bane for constructors. Check out the lower left — Mickey and Pawel do well to include a black square at the very corner, but still are forced to use ADONAI, a toughie. Along with KANPAI, it made for a crunchy experience for me. I wouldn't mind as much if there weren't already some SERIE / HOSP, EMAC / KCAR, ALER, etc. through the puzzle.
Speaking of SERIE / HOSP, it's so tough to bracket a region with two themers, like in the south. DOWN THE HATCH on top, PROST on the bottom ... it's no wonder a few dabs of crossword glue were necessary to hold things together. When a themer is on the bottom edge of the puzzle like PROST, you can't separate it from other themers using black squares — might have been better to jam PROST somewhere in the middle of the puzzle.
I've been to Japan maybe 20 times, done a lot of drinking. For the job! (It's super important to go out with business colleagues after work.) It still took me a while to recall KANPAI, though. (Then again, I did usually drink way too much …) Hopefully, KANPAI won't be the black sheep for solvers. I do think it's reasonable, but it did feel a little out of place.
That said, fun to get so many drinking exclamations. Made for a cozy — dare I say toast-y? — puzzle.