Not bad for a Monday. We didn't know the exact spelling of HARA (6A: ____-kiri), and the 3D: Swiss river (AARE) is only familiar to us from crosswords, and didn't come immediately. Isn't there also a mountain range or peak spelled "Aar?" Anyway, many of the clues were just a matter of punching in letters, as is often the case on Mondays.
Franny liked the 37D: Nutty (COCKEYED) and 51A: More nutty (KOOKIER) pair. Lots of Cs and Ks in that corner. Also, she wrote in "tape" for 1D: Record for later viewing, in a way (TIVO), which shows our age a bit, I guess. We were also familiar with both parts of 10A: Rubik's Cube and troll dolls, once. There were trolls in both our households as youths. There were also Tiddlywinks, for that matter. And we thought 47A: Fan setting of 1, say (LOW) was a good one.
The theme was solid and beautifully symmetrical, and the POPUP (69A: Easy to catch hit... or what 1- 21- 26- 48- 55-Across all do) was a nice call back to David Steinberg's "POPUPTOASTER" on Thursday. And speaking of callbacks, 33D: Class after trig (CALC), sounded awfully familiar. Did we just see that recently as "Class before Calc?" I couldn't find it in a quick search of the last few days, but I'm almost positive it was in the last week. The long answers were all interesting, and the fill was relatively clean. A few things like SRA, ORO and ORIG, but it wouldn't be a crossword puzzle without a few of those.