Tackle trays look like a commodity, and mostly they are. The thing that actually matters is the number on the label. A 3600 tray is about 11 by 7.25 inches and 1.75 inches deep. A 3700 is about 14 by 9.13 inches and 2 inches deep. Those are the figures Plano publishes for its own StowAway trays, and most other brands build to the same footprint so their trays slide into the same bags. Buy the wrong size and it will not fit the bag you already own. That is the most common tray mistake, and it costs a return.
After size, three things separate a good tray from a cheap one: a gasket that keeps water out when the tray goes overboard or sits in a wet boat, some kind of rust protection so the hooks inside do not turn orange over the winter, and latches that stay shut when the tray is stuffed in a bag. This page ranks eight trays on those points. The Tray Size column tells you which standard each one is, and the chart further down shows which bags and packs on this site take which size.
Every rating and review count here was read off that product's own Amazon listing while the page was being built. Those stars belong to Amazon's buyers, not to us, and Tom has not used these trays himself. If you only buy one thing from this page, match the tray size to your bag first, then pay for a gasket only if your trays actually get wet.