Advocate meter

I use the Advocate Meter. It is the cheapest test strips i can find. I don’t have insurance. Sometimes i found they are pretty accurate compared to one touch but that is not always the case. I wonder if it is reading lower then i really am. Another thing i notice is it can test twice and be 50 points off (sometimes). Does anybody use this meter and what is your opinion on it. Also is there another accurate meter that test strips are cheap.