Consider this product if your feet need a good massaging. It's easy to use, and you can vary the firmness of the massage- all you have to do is press down as hard as you want with your feet to get a firmer massage. Know that the heat feels great, BUT, know that you can turn it off if you need to. Also, the machine uses rotating balls, which is good, because can simply move your foot around to target the worst spots on your foot.
While not as good as a professional Shiatsu massage, it can only work the bottoms of your feet- but, nothings perfect! Other useful foot care products I found include The 5-Minute Plantar Fasciitis Solution
if you suffer from plantar fasciitis.