I purchased the Homedics Foot Spa at Walmart for just 12.99 and felt like I was getting a great deal. It is lightweight and has little bumply rollers on the bottom that fit around the arch of your feet and the rest of the bottom area has raised bumps to also rub your feet on. The power switch is a simple on/off.
What a didn't realize as I have no real foot spa experience (this was my first ever purchase of one) is that there is no heat element in the spa. Whatever the temperature water you put in the spa is the temperature you will be soaking your feet in.
The foot spa is actually pretty quiet while you are sitting there soaking your tired dogs, but I noticed if someone is using it in a different room, the vibrations travel through the floor. It took me a few days of wondering where the strange noise was coming from when I was in a different room until I realized it was just someone soaking their feet.
The Homedics foot spa is easy to clean and maintain and gets a thorough workout at my house. We just love it. It's just a simple, basic unit, nothing fancy, but it does its job and the price was right!