UPDATE: May 12, 2014
The FDA issued a warning about Genstrips, telling people not to use them as they are not accurate and the company making them failed quality inspections. Reviewers on Amazon also report that while the strips they purchased earlier worked well, as did mine, the newer ones did not.
http://www.fda.gov/medicaldevices/safety/alertsandnotices/ucm395180.htm
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