I have a FABULOUS infrared sauna, made by Sunlight Saunas. It was recommended by Dr. David Williams, who I highly respect and admire. I am using it for my 87 year old grandmother, who has advanced breast cancer, diagnosed stage 4 in Feb 2009. She uses the Solo Unit every day, for about 40 minutes on level 2(lower) and 7 (upper) - and it is a remarkable therapy. She sweats pretty good, which is important. FYI, we have the SOLO unit.