For years I thought matching meant good. Table and four chairs, all the same wood, all the same finish, boxed up together so there was nothing to think about. That's exactly what I bought the first time, and within a year two of the chairs wobbled like they were standing on a boat, because the whole set was built to a price, not to actually hold a grown adult leaning back to grab the salt. What put me right was sitting on a floor model in a shop and feeling the difference between a chair with a proper joint and one held together with glue and good intentions.
When you're looking at a set in person, skip the tabletop entirely and go straight for the chair joints, that's where cheap sets fall apart first. Push down on the seat with your palm and see if it flexes or creaks. Check the table legs are actually bolted through, not just screwed into particle board, because particle board strips out after about a dozen times of someone pulling the table away from the wall. On delivery day, count every bolt and bracket against the instruction sheet before the delivery people leave, and sit in each chair once, not just look at it, since a set can ship with four chairs that all feel slightly different depending on which batch they came off. A good set should feel the same sitting in chair one as it does in chair four. A bad one rarely does.
Where these go wrong is scale, not style. A six seat set crammed into a room that really only fits four turns every meal into an obstacle course, and a heavy farmhouse set in a small apartment eats the room alive before you've even put food on it. It also fights with a room that's already busy with pattern, a bold rug under a set with a heavily grained top just turns into visual noise, so one of the two needs to calm down.
Solid wood sets earn their money back over time in a way veneer never does. Veneer chips at the edges where plates get dragged, and once it's gone you're looking at bare board forever. Solid wood takes a scratch and still looks like wood. Wipe spills quickly, use coasters or mats under anything hot, and give the whole thing a light wax or oil once a year depending on the finish, and it'll age into something with actual character, water rings and all, rather than something that just looks tired.