I've had one for about 2 months, and I love it. With a little practice, it's very easy to control the temperature, which makes it easy to cook anything from a 7-minute steak @ 500-550 degrees to a couple of slow-cooked/smoked whole chickens @ about 225 degrees.
Everything we've cooked on it has been delicious. Whether it's worth it or not depends on how much you would use it. Also, if you just want something to grill burgers and an occassional steak, there are much cheaper options that will do the job quite well. But, if you enjoy or think you would enjoy being able to cook a wide variety of foods, then the BGE is an excellent choice and well worth it.