It is important to make sure that you have enough room for everyone who will be sleeping in the tent. A family or group of friends should look for a tent that can comfortably fit all of those individuals, as well as any other necessary items such as sleeping bags and pillows. To optimize your comfort, don't hesitate to buy a roomier tent with a vestibule space for storing gear and moving around. You'll thank us later.
Regardless of your choice, we strongly suggest that you get a groundsheet to extend the life of your tent. Indeed, the groundsheet is designed to protect the tent floor against wear and tear of the ground as well as prevent water buildup underneath the tent from the rain.