Lee's right the info you really need is not usually available at the time of purchase. A database of medical equipment evaluations would be useful. We used to get evaluations through the predecessor to the MHRA/ MDD. Does anyone know if those evaluations are done anymore? In addition to the standard evaluation, the database could be updated to include long term tests, reporting good and bad findings, a sort of wiki-medkit-pedia. Anybody got the time or inclination to make a start?