Yes, it's a therapeutic tool - anything that keeps me upright and moving is a good thing!!! I have psoriatic arthritis and osteoarthritis, in all of my body. Not a pleasant thing at all!
The biggest benefit from using the Whole Body Vibration machine is better balance and sureness of feet. I was beginning to walk as if I even more elderly than I am, very carefully and timidly.
I have noticed some toning but not weight loss. I have a home gym with lots of other things to use including a Bowflex, treadmill, strider, etc. I will occasionally use exercise bands that I've accumulated from various physical therapy sessions over the years. I put the illustrated exercises on magnetic boards on the walls of my gym so I won't forget the proper form.
For me, speed = impact = pain. So anything that I do is mostly in slow-motion! My maximum speed on treadmill or walking outdoors, is 3 mph on good days. Not all days are that good!
My weight loss, which is significant, comes from exercise and low-carb eating for the past 10 years.