I have used the Raaco-sized 1/3 (height) trays and do like them quite a bit, especially for the 1/2" counters where I prefer to give each counter its own compartment. 8 of any support weapon is sufficient for most scenarios, as well as 8 of each crew type (I leave out extra crew beyond 8, placing the extra 4 or so back into the original module box).
For the 5/8" counters (guns & vehicles) I also like to give each type its own compartment, even separating the AFV mg variants. Only a few exceptions need two compartments, such as the 251 halftracks, one of the Shermans types, and the T-34/85s including the Forgotten War ones and a few others.
I've only begun looking at the 1/4 trays, and think I will shift over to using them for the vehicles & guns. However, I'm undecided on using the 1/4 trays for storing the 1/2" counters, as I'm not sure if I like to spread out the identical SW counters (such as LMGs) over two compartments. Also, the 1/4 trays seem to not stack as well/feel flimsier compared to the 1/3 trays so I'll have to test this out a bit more. Stacking four of the 1/4 trays atop each other seems to leave more of a gap at the top (about a mm or 2) than stacking three of the 1/3 trays.
Note that I use the standard Raaco A75s for squads and half squads, and my information counters go into BoxBox trays for easy access during play.
From top left clockwise: 1/3 tray, A75, 1/4 tray, 1/4 tray.
1/3 tray next to 1/4 tray: