It's worth every penny getting it done. Although most of mine aren't microchipped I'm on the list for the poor house and a paupers grave, I have heard of cats (and dogs) being reunited with their people even nine years later due to the chips. Kuhio (Lisa) has been an advocate for microchipping ever since she lost her beloved kitty Kuhio, and Kuhio ended up in a shelter and was euthanized before they found her. Go for it.