Wishing you the very best outcome from your surgery. My unilateral dbs in Nov 2010 has almost obliterated my very bothersome left arm tremor and led to improved sleeping.I continue to work with a very good programmer & MD to help with other symptoms. I am also planning to be evaluated for bilateral dbs in the not too distant future. It's a hard decision to reach, and for me, required summoning courage that i didn't know i had. take care!