I absolutely love the ease of using these test strips. They are my favorite to use for my furbaby. But sadly, I have 2 issues with them. It is the cost and availability of them. I have to keep a different brand back up meter for when I am low on funds and cannot order the pet test strips. Or for when I run out before I order, or waiting on delivery of an order. Part of that problem is of course the delivery company or postal service. They both are not that reliable in my area. The only places of availability are thru Countryside or Amazon. My back up meter, I can run to the store and grab a supply of test strips at a much cheaper price. Though I will order the petest strips again when I can.