Look for a grill with stainless steel burners and a limited warranty in case something goes wrong with it. You may also want a grill with a warming rack for quick heating and a side burner so that you can cook multiple things. A grill that is easy to assemble is great too.
When looking for a propane grill, it is important to take note the quality of construction that the grill has. Cheap grills have a somewhat flimsy construction. The burner should also distribute heat evenly throughout the grill. Small grills use less gas. With a little help and commonsense, shopping for a grill can be a rewarding experience.