Critical downside - you can only scroll through the settings. There are a number of settings, but most feel really random and suck. So for me there are only two function settings. I'd rather have a larger range of unstructured vibrations. As it is, it's medium and high. Sometimes you want low. Sometimes you want an extra high. This is really just a failure for me. I've tried it on some sore muscles and found it amazingly helpful. The head is smaller than the average stick, which is great for more precise muscle impact. So if you're really looking for a muscle massager, maybe this will work?
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