I just read about it. What I read said it's had good results, but runs a lot of risks. What it is (as you may know, but I'll say it anyway) is a little battery pack they place in the upper left section of your chest, and connect a wire to the vagus nerve in your neck. At various intervals and intensities - as decided by your doctor and you - it stimulates that nerve, which somehow causes your mood to elevate. I think what I read said it affects neurotransmiter /brain chemical levels, boosting how much is made. I believe it was developed somewhere in Europe, and I think trials are being run in the US, but it may not be approved yet.
Really, it sounds like a last option. If medicine, ECT, and (if it's available) that TSI-or something thing(similar to ECT, though possibly better, but not widely known/used - also may not be approved in the US, I forget), then this stimulator may be something to try. Personally, I really wouldn't be hot on the idea of having this thing stuck in my chest - which also risks nerve damage.

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Matthew 11:28
Come to me, all you who are weary and burdened, and I will give you rest.</font color=green> Sounds good...