A good small storage cabinet has a little weight to it even when it's not full, a drawer that doesn't rattle when you close it, a door that shuts with a soft click instead of a bang. Open one up and it should smell like nothing, not glue, not particleboard trying to pretend it's oak. Run your hand along the top and you want a surface that can take a stack of mail and a coffee ring without flinching.
Before you buy, measure the actual wall, not the gap you think is there, because an entryway that looks roomy in your head is often twenty eight inches of clearance once you account for a light switch and a door swing. I've sent back two cabinets for being three inches too deep for a hallway that I swore was wider than it was. Height matters just as much, maybe more, since a cabinet that's too tall in a low ceilinged room or beside a window makes the whole wall feel cramped, while one that's too short just reads as a side table wearing a disguise. A good rule is to let it sit a few inches below the nearest switch plate or window sill so it looks placed, not squeezed in.
In an ordinary room, these sit well next to things that already have a job, a reading chair that needs a lamp and a spot for the remote, a bathroom with nowhere to put towels, a hallway that's all coats and no drawers. They pair easily with plain painted walls, a worn rug, a basket of shoes, nothing fancy required. They make the most sense as backup storage, the place for chargers and batteries and the extra roll of tape, not as the main event in a room that's already busy with a bookcase and a buffet. Where they fall short is anywhere you need real volume, linens for a whole house, serving pieces for a big family dinner, because a small cabinet by definition can't hold much, and asking it to do a dresser's job just means you overstuff it and the drawers stop sliding.
What I like most is how they change once they've had a year of actual use. The top picks up a faint ring or two no matter how careful you are, the drawer pulls get that slightly duller shine from hands reaching in every day, and somehow that wear makes the thing look more like it belongs, not less. A cabinet that still looks showroom new after a few years probably hasn't been doing much work.