Indy51
Expert
Not sure if they have improved since Jenny Ruhl wrote this blogpost in 2010? She doesn't rate them at all.
http://diabetesupdate.blogspot.com.au/2010/01/study-a1c-now-test-is-****-and-so-are.html
http://diabetesupdate.blogspot.com.au/2010/01/study-a1c-now-test-is-****-and-so-are.html