Depending on how much you spend and what brand you buy is going to determine the quality.
Portable gas grills are perfect for camping or if you live in apartments and don’t have much porch space. There are certain feature you need to look for when buying a portable grill.
Does it have a ignition button? Many do not come with a ignition button and expect you to spark it with some kind of external flame. This can be very annoying at times.
Is the cooking surface big enough? These grills are pretty small but is it to small? If all you have is a weber portable gas grill and you are cooking for a family reunion for 40, it just wont cut it.
Who makes it, Is it going to alotcause you are moving it around a lot, getting a name brand grill is important. These last longer and wont be as likely to be damage from being moved about.
There are some important features you should be aware of when making a purchase. To properly broil a steak you have to deliver a minimum of 30M BTU's. But even with 30M you will have to close the lid to the grill and allow it to reach 700 degrees fairenheit before placing the steak on the grill.