I've seen some discouraging comments about this meter/sensor. I want to post a positive review! My cat's has stayed on well so far. It is covered with a wide cloth collar and affixed with tissue glue by the vet. It is SO easy to use, and gives a curve fairly easily! I could NEVER have gotten the detailed info that I have with ear pricks (6 or more a day). You then upload from the meter to a web site for your vet to view. The only downside, and it's a big one, is that you must scan the senor every time you want a reading. It does not record automatically. This is a big downside for those without flexible schedules, or anyone who wants to see night time readings. I was WRONG about not recording automatically. I was misinformed. It DOES record automatically every 15 min. But you must scan the sensor within 8 hours to get the data, or it will be lost.