The AFV Club track sets for HVSS Shermans? Leave those
very much in the shop — the holes in the end connectors are slightly too big for the pins, so the connectors slide off if you so much as turn the track over. Sometimes even when you’re handling it without even turning it over. In addition, there’s an ejector pin marking in the centre of each block, but you can’t really file it off because if you do, the pins in the middle kink and break. Easily the worst AFV Club track set I’ve ever tried building. (All of this also goes for AFV Club’s M26/46/47 track, BTW, as that’s the exact same other than the guide horn parts.)
The AFV Club VVSS Sherman tracks are better, especially the T51 (flat rubber blocks), on which the end connectors stay on as they should. Oddly, in the T48 (rubber chevrons) the pins are slightly narrower so the end connectors sometimes come off, but nowhere near as badly as for the HVSS tracks.
I’ve also built Dragon HVSS tracks, which I didn’t find great because they’re non-workable, and the set from RFM. That one is quite good but is a
lot of work; see
this thread for a full review and tips on building them.
If you’re after T66 tracks (the waffle-pattern ones that were used at first in the Second World War, but hardly in Korea), then I found Trumpeter’s set to be very good.