I had it done on a spinal, in South Carolina.  I woke absolutely
clear-headed, no grogginess, but still had to stay in recovery for
three hours until I could move my feet.  This happened to me before
after a spinal, so I guess I'm abnormally sensitive to it.  I still
think the spinal was worth it to avoid the anesthesia "hangover."
Results are great so far, at three months - fabulous stream, complete
emptying, no discomfort, no meds.  Still some false urgency, but that
is improving.