MYDX CannaDx gets EXCELLENT review on Medicinal Star's large MJ blog in Portugal dated March 8, 2017. The review is in a video clip on the site. The test of the MyDx CannaDx unit gave results almost exactly the same as a laboratory test print out of the same sample. The reviewer says 'I'm extremely happy with my MyDx unit. A more precise link: http://medicinal-stars.blogspot.com/2016/10/mydx.html