Four cars rebusized today, with an apt COMPACT CARS revealer. FOR DUMMIES was fantastic, especially since I plunked in DUMMIES right away, and then was stymied by the crossing AF? pattern. Delightful a-ha there.

ROPE LADDER was another great rebus entry. That's the way to get some juice out of your themers!
Unfortunately, OPEL stuck out to me, as I see FORDs, KIAs, AUDIs all the time, but I've only seen an OPEL in crosswords — even back when I was traveling all over the world. I would have much-preferred GMC (EGG MCMUFFIN, YOUNG MC), or even VW (ROE V WADE, UV WAVES). Probably others, too.
No doubt the GMC option would have required longer themer rebus answers, but that would have been nice. I enjoy rebuses the most when they're part of snazzy, long phrases, especially when those phrases are longer than 15 letters — it's so infrequent that you see a 16+ letter crossword entry!
In the past, Will has told me that for rebus puzzles, the longest entries in the grid ought to contain rebuses, and I'm fully on board with that now. PLAUDITS and GAUDIEST are fine words, but they're so short that they pale in comparison to the catchy OPEN AND SHUT and DANCE AROUND.
It also doesn't seem right that the so-so LIMA OHIO is the same length as GAUDIEST / PLAUDITS, and SLOVAKIA.
Fantastic misdirect on the "Casey at the Bat" clue. I struggled mightily to recall who wrote that (Ernest Thayer). Turns out I skimmed the clue too quickly — it's the autobiography of Casey STENGEL. Clever!
[Cellular carrier?] for RNA also shined.
And I appreciated Emily's effort to include bonuses in the fill. DIRT CHEAP, MANDELA, OLD SAWS helped make up for some of the ALII, SEL, ALC kind of crossword glue.
Overall, a solid rebus concept. These days though, the body of rebus work is so large, that new ones have to shine nearly perfectly or innovate to stand out.