I used both the AlphaTrak2 pet monitor and now use the Relion Confirm. Perhaps the pet meter is more accurate, but you are still going to get measurements using the human meter, and that's what is important. The numbers are going to tell you if the BG is too high or too low.
It's also important to able to afford strips, pet meter strips are about a $1 apiece, sometimes a little less, but you have to order them and wait for delivery. That might be a matter of a few, or many days. I can get Relion strips at a 24 hour Walmart if I need to, and afford them much more easily.
The most important thing is getting the BSL and knowing how the insulin is affecting your fur baby, keeping him/her safe. Insulin is going to help kitteh feel better, but you need to know how much is going to help and avoid a hypo. (Another reason to have lots of strips handy, just in case.) It is a lot to learn, I remember very well. But you will, because you care.