they work just fine.
They sell these strips at Walgreens for one of their brand name devices for $75 for a case of 50.  With insurance it drops to about 25 cents a strip.  When I told the clerk at Walgreens that I can get them at insurance prices without a prescription, she didn't believe me.  I've ordered these twice now for my TrueMetrix Air device, they work just fine.
Rating: 5 stars