Thank you very much.Quite a few CWE members have had the VNS implant. Some have had great experiences with it, some not so much. I'm sure you'll get plenty of advice either way.
Here are a few threads to get you started:
And the link below will take you to all CWE threads tagged with VNS:
Maybe it's just the medical personal in Phoenix but most of them here are totally clueless when it comes to what a VNS is.