Really mixed review for me. Product was delivered on time and really easy to post test kit back and get result i.E overall very efficient service. What I didn’t feel comfortable with is the testing process and threshold criteria provided. Anything above 51 should require further investigation and there is risk. Anything less than 50 is deemed to be less risk and safe. My reading was 49. This doesn’t fill the consumer with confidence and felt actually that this was not an accurate reading, instead for possible conservative reasons the score was put at the maximum level before there is risk. I would have preferred and expected an actual precise measurement.