Basically, I think it's ok as long as you only need one value and too mean the doctor has to pay a separate blood sample. The problem I find, however, to fill with enough blood the little tube with the small hole. Someone with no experience is necessary to apply this some tricks that are not described on the set. Warm rubbing the fingers, previous immersion in warm water, Arm Circles ... and hope that it is not the tubes seeps past. After all, you can now receive a new set if it goes wrong. Therefore only 3 stars.
The test itself takes place in EDTA whole blood - the most meaningful for my medical practitioner.
