The thing nobody tells you until you've owned one through a winter is that the lid matters more than the box. A flat lid pools water and then that water finds the one seam that wasn't sealed right, and six months later you're pulling out cushions that smell like a pond. The good ones have a lid with a slight pitch to it, or a lip that actually overhangs the sides, so rain runs off instead of in.
When you're looking at one in a shop, or the day it shows up on your porch, check the hinge first, because that's what fails. Cheap hinges are a thin strip of plastic riveted on, and after a summer of sun they go brittle and snap, usually while you're holding a cushion in one hand and trying to prop the lid with the other. Press down on the base too. If it flexes under your hand, it'll flex under a stack of pool noodles and garden tools, and eventually it just gives. And actually get down and look underneath for feet or a raised lip, because a box sitting flat on concrete is a box sitting in a puddle every time it rains.
If you've got nothing out there yet, start with one that's a size bigger than you think you need. Every single person I know who bought the medium one regretted it within a season, because garden stuff multiplies, cushions multiply, and suddenly the hose is living next to the back door instead of inside anything. Get the large, even if it looks oversized in the shop.
What separates a box that lasts from one that cracks in its first cold snap usually comes down to the plastic itself. Thin, glossy plastic looks fine on day one and chalky and brittle by year two. Look for resin that's a bit matte and thick walled, or honestly a well made wicker effect one with a liner, which handles UV far better than it gets credit for. Woven natural baskets are lovely for inside a covered porch but they are not a storage solution for anything that needs to survive open weather.
On color, I'd steer away from anything glossy white, because it shows every bit of pollen and dirt within a week. A dark charcoal, a muddy green, or a warm taupe wicker tone all hide grime and sit happily against brick, decking or siding without fighting the rest of the yard.
A good one basically disappears into the space while quietly taking all the clutter with it, which is the whole point of a porch or patio that actually looks like somewhere you'd sit down.