I used to buy tables for the room they'd sit in, not the people who'd sit at them. Had a lovely round one for years, seated six if everybody kept their elbows in, and every holiday I'd be dragging a card table out of the closet to tack onto the end, mismatched height and all, so my mother in law could have somewhere to put her purse. What fixed it wasn't a bigger table, it was finally counting heads honestly before I shopped, including the two cousins who always show up uninvited and the kid who needs his own chair now that he's four.
What tells a good set from a disappointing one shows up fast once you're living with it. Solid wood, or a honest veneer over real ply, moves a little with the seasons, tightens up in winter when the heat's running, loosens slightly in a humid summer, and that's normal, not a flaw. What's not normal is a wobble that shows up in month three because the joints were glued and screwed with no real doweling or mortise work underneath. Run your hand along the underside before you buy if you can, feel for actual joinery, not just a leg bolted to a flat panel. Chairs are the part people skimp on, matching the table and forgetting the chairs get pulled out, sat on hard, leaned back on by a teenager who should know better, for years. A chair with a proper stretcher between the legs will outlast one that relies on the seat frame alone to hold its shape.
Where this kind of furniture goes wrong is in small rooms pretending to be big ones. A table built to comfortably seat ten in a room that only fits eight with the chairs pushed in is just a daily inconvenience dressed up as ambition, and a heavy dark wood set can make a small dining nook feel like it's been sealed shut, especially in a room that only gets afternoon light. In an open plan space, a chunky traditional set can also clash hard against a sleek kitchen, not because mixing styles is wrong, plenty of good rooms do it on purpose, but because an accidental clash reads as indecision rather than taste. If your dining area doubles as a home office or a kid's homework spot most nights, a precious finish that shows every water ring and pencil mark is going to make you anxious instead of comfortable, and that's no way to eat dinner.
Given a few years, the good ones get better. The finish dulls down from a shine to a softness, the wood takes on small marks that stop looking like damage and start looking like a record, and the whole thing settles into the room instead of sitting in it.