Do blood glucose monitors have error ?

Do blood glucose monitors have error ? i think yes, they have ....but which brand is the best?. I want to have a meter that has same accurate with the lab result or really close with the lab result. If the lab says 105, but the personal meter (monitor) says 120.. i dont want to use it again later. If the... show more Do blood glucose monitors have error ?
i think yes, they have ....but which brand is the best?.

I want to have a meter that has same accurate with the lab result or really close with the lab result.
If the lab says 105, but the personal meter (monitor) says 120.. i dont want to use it again later.
If the meter shows 104 / 106 / 107.... then i would like to keep it & use it again later.

Thanks a lot.
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