The first key holder I ever bought was a little magnetic strip that cost almost nothing and held exactly two keys before it gave up and let them slide down behind the mudroom bench. What I learned from digging them out with a yardstick is that a key holder only earns its spot on the wall if it can hold the weight of what you actually own, not what the package promised.
These do best right by the door you actually use, which in most houses is not the pretty front door but the side one, or the mudroom, or the spot at the top of the basement stairs where everyone drops their stuff on the way in. A small front hall in a rented apartment, a farmhouse entry with boots and dog leashes piled up, a condo with one door and six key fobs for a bike lock, a storage unit, and a dead bolt, all of these work fine with a hook rack or a small dish by the door. Hooks suit a house with more than one person coming and going, since you can give everyone their own spot and stop the nightly "has anyone seen my keys" routine. A dish or tray suits someone living alone who just needs a landing pad. Winter is actually when you notice whether one is any good, because that is when you are coming in with gloves on, arms full of grocery bags, trying to hang a key by feel alone, and a rack with hooks too close together turns into a little tangle of lanyards and carabiners.
The honest limits are worth saying out loud. A holder with three hooks looks plenty in the shop and then you get home with your keys, your partner's keys, the spare for the neighbor, and the one for a lock you can no longer identify, and suddenly it is overcrowded, which is its own kind of chaos, just a smaller, wall mounted one. Check the hooks with your hand before buying, give them a tug, because thin wire hooks bend under a heavy ring of keys within a season. Anything adhesive mounted should be tested on the actual wall texture, not assumed, since plaster and old paint do not always cooperate, and a rack that drops off the wall at eleven at night is not a quiet sound.
Where it does not belong is anywhere damp or exposed to weather, so skip it for an unheated porch or a mudroom that gets direct snow and salt spray, metal hooks will rust faster than you'd want and the whole thing starts looking tired within a year.
Can I actually hang my heaviest, most overloaded keyring on this without it sagging by spring?