Review (5/5): I love the clammie :)
The stones are extremely uniform in shape and heat up fairly evenly. Takes about 20 minutes or so to heat up. This is not a heavy duty unit , so you need to just be careful and only move the unit WITHOUT the stones in it. Put the stones in a bag when traveling. I like it. Seems very convenient to bring to other locations for a spot treatment. Just note that after you use the stones, place in a bowl to be washed after. I would not recommend putting stones back in unit to 're-heat' like you do with water baths for hot stone treatments. Oil on the inner heating plates could be problematic. So for a spot upgrade in a massage office would be great. or stones used for a foot treat, the small ones are nice. And even for just home use , should be great. Always make sure stones cool to proper temperature before applying to skin