Also consider we are electrical beings and high levels of magnetism effect electrical beings adversely. This technology has not been studied enough and DOES have an effect on the body.
There is more and more data being compiled on the harmful effects on emf in general and according to many scientists (who are not part of the industry that benefits from devices that emit it) there are many cellular problems that can arise.
Here's a little piece by a doctor. Notice a few of the reported side affects (short term). Long term effects have not been studied.
Biologic Effects of 3 Tesla (T) MR Imaging Comparing Traditional 1.5 T and 0.6 T in 1023 Consecutive Outpatients. J Neuroimaging 2007 Jul;17(3):241-5. Weintraub MI, Khoury A, Cole SP.
" The recent use of high and ultra-high magnetic field (MF) systems (3.0 T and above) have raised concerns about biologic effects and safety. Sensory symptoms (magnetophosphenes, dizziness/vertigo, headaches, metallic taste, pain changes, and cognitive effects) have been reported. According to the authors-- New onset symptoms occurred predominantly with 3 T and female preponderance. Vertigo/dizziness , headache, spine pain occurred more frequently on 3 T, whereas magnetophosphenes and metallic mouth symptoms occurred principally in 1.5 T. Symptoms of vertigo/dizziness, headaches, and magnetophosphenes were more commonly seen in individuals undergoing brain MRIs but other body sites were also represented. Although no harmful effects, an unexpected high rate of 14% of individuals experienced sensory stimulation in both 3 T and 1.5 T units. Females appear to be more magnetically sensitive."