I bought this product because the test strips are a lot cheaper than for my usual ones which worked out very expensive for me. however I have have compared this on several occassions to the readings on my other two meters, OneTouch and Aviva Accu-Check (both purchased in the last 12 months) by taking 3 readings at the same time and there is a significant difference. eg Codefree 6.5 against 5.0 on the othr two meters. I now see this is a common complaint - should have read the amazon reviews first!!