Whether it's "good" or not in terms of weight loss depends on what you put in it and how you are treating it as part of your total food for the day. Sure, the ingredients are healthy, but you can quickly take in a LOT of calories with one of those things.
If you go to their website,
www.smoothieking.com, you can find out you need to know. Click on On the Menu, then Smoothies, then Find the Right Smoothie, to get the nutritional info for the various types. I clicked on 5 or 6 randomly and they ran anywhere from 206 to nearly 500 calories for 20 oz, and that's without any additions.