gymrat,
I don't know much about the VNS. But, having part of our brain removed can have some bad side effects (temporary and permanent). It's scary going in for brain surgery. Some people's seizures actually get worse from surgery or they don't get auras anymore and still have big seizures. Memory can be damaged. Personality can change. Anxiety disorders and/or depression can get worse. Also, a brain hemorrhage or brain infection could possibly occur but is unlikely. I felt like my personality was changed for awhile. It was scary. It was freaking me out. I felt like I had severe anxiety disorder and was bipolar. I was crying a lot for no reason. Before surgery, I very rarely cried. But, apparently these are common side effects. I was freaking out b/c I didn't know how long it was going to last and whether it was permanent or temporary and if permanent whether it would be a lot less severe. This went on for about six months after the surgery. Also, things seemed surreal to me after surgery for several months.