Space and Capacity are two important things to be looking at. It's obvious that you shouldn't buy anything you can't keep where you eat, and it's a difference in buying furniture for a kitchen, then for a dining room.
It is also important to have enough for each of the members of the household, but also have the option of buying something enough for guests you might have for larger celebrations, or people sleeping over at your home.
After you have found out how much space you have available, and how many people it should be space for; it's natural to look at the furniture style you like and how comfortable the chairs are to use. We would in most cases advise looking at colors and styles fitting the rest of the furniture at your home.
In some cases, the style you find has uncomfortable chairs, in which case you might consider looking at other dining tables and chairs. The trick is to find something having both a good looking style, but also being comfortable at using.
Quality and price are often opposite to each other. If you want quality you can get it from Home street home. And if you are finding something budget-friendly it might have less quality. It is, of course, possible to find both, but it's rare.
We would strongly advise you to find dining furniture which is according to your salary; do not attempt to buy something too expensive, or buying everything on credit.
You should not buy according to your neighbors and your friends, but according to your personal financial situation, and fitting the criteria you are looking for when buying. Forget what everyone else has, or want. Think your own capacity, style, and budget; forget the rest of the world.