Prariegirl--I think the Walgreen's tests that are sent away work fine UNLESS YOU HAVE YOUR TEST DONE ON THE WEEKEND!! We had our tests done on a Saturday and they didn't even mail them away until Monday evening. Online it said the test results would come back in 2-3 days, AFTER they finally received them. The timing got way too close for us, so we had to go pay $150 each for another test that the results came back in 20 minutes. We paid that money for the tests, got the results back, got our approval back from EHAS, and THEN got the email saying that the test results from Walgreens were back.