Don't purchase if you have other bluetooth devices paired to your phone
The PowerDot does not work well if your phone is paired with other bluetooth devices at the same time that you are using your PowerDot. I.e. you will suffer from connectivity issues on the PowerDot alone (not your other well engineered hardware). Want to use a fitness watch to track your workout while you use PowerDot? Out of luck. How about wireless headphones for your workout? No way! PowerDot doesn't let you do any of these things.
I reached out to customer service. Their recommendation was basically that I use *another* device (such as an iPad or old phone) to use solely for the purpose of controlling my powerDot. I.e. they're asking customers to dish out hundreds of dollars on a device that requires you carry along yet another device just to control it. Don't have an old phone or iPad laying around that you feel like bringing with you to your workouts, in addition to your phone that you use to actually stay connected with the world? You're out of luck!
PowerDot might work great on some phones/devices. When it does work, it does its job well. But! Don't be surprised if the first week into your workout regime, you find out that your PowerDot has been disconnected and won't reconnect no matter how many troubleshooting steps you go through. Believe me: I've spent a few hours doing the troubleshooting myself already.
Not the customer experience you want to have when you're dishing out hundreds of dollars on a supposedly "Prosumer" product.