I love my QardioArm, love the way the App tracks your progress. Love the battery powered unit is great too, no plugging in and easily activated by using the App.
The QardioBase is great too, I did have some technical issues that were resolved quickly by customer service, Great experience. I also love how the App tracks your weight and other measurements, also entering in a target to achieve helps with the motivation.
I would highly recommend both products.