All in all, I am liking the process - this is my first experience with tracking serum ketones. A couple of things - The foil packets are very hard to open. I find I need scissors and that's inconvenient. Also, the strips are pretty pricey. A bargain, perhaps, compared to having lab work, but more expensive than the brand of glucose strips I was using previously. Reordering the strips got a little wonky - there seemed to be different options available depending on how I got to the "store" but eventually everything worked out. The shipping was quick, thank you. The thing most disconcerting to me is how two tests performed within a minute of each other can give results that vary by ten or more points. I experiment sometimes comparing your monitor with my old glucose-only device and am not entirely surprised by what seems like a significant difference, but why does this happen with tests done both on the KM device?