I am very pleased with the 900. I have been using it for two weeks now and can definitely see an improvement in rosacea on my nose and face. I like the whole body aspect of the 900 and it seems to be helping with overall joints (I'm 67 and spent 40 years in law enforcement, so I have aches and pains throughout my body). In fact, I then purchased the 450 panel, which I received yesterday. I will be combining it to the 900 for an even larger area of therapy. Also, for background, I spent countless hours conducting product searchs and reviews of numerous manufacturers of panels. I found this company to be the best. I also appreciated the straight forward video information, which I found to be trustworthy.