This is the first vial of test strips that has given me issues. I had a couple of results that seemed off, so I used the control solution, and the result was outside the range it should have been. Vial says control solution should be 100-185. First test was 209. I did another, and it was 131 - actually in the range. Went for a third, and it was 187. The results are supposed to be within the range, not at all over. So, this is concerning. Now, I am not going to really be able to trust any of the strips in this vial. These strips are too expensive for this!