Acupuncture for Anxiety?

Anyone tried it? How were your results? We got a bunch of coupons at work for a local clinic, and I'm willing to try anything for Mr. Gambit.

I have two patients, one cat and one dog, who I've treated for anxiety using acupuncture (along with other more traditional treatments, medication and behavioral modification).

The cat, the owner thought she was seeing improvement but the owner had some life changes and stopped coming. The dog, fairly minimal but I didn't treat him for that long.