I had a general anesthetic for my hip and a spinal block for my hip.
The only downside of the Spinal block was the discomfort having the injection into my spine, but no worse than an injection at the dentist.
The up side is that there is no recovery period after the op, I was given a cup of tea in thye recovery room and eating my evening meal an hour later.
The other big advantage is that the effects last for 24 hours or so, which means n o pain whatsoever, so less morphine.
It is safer.
The after effects of a GA are unpleasant and you will need morphine asap.
However you must be prepared to be awake and talking during the op, but I can assure you you will not feel a thing.
I found one aspect very odd. Just after they got me on the table and the green sheet in place, a foot appeared above the sheet being painted with iodine. It was not my foot !, my foot was firmly on the table.
You will have a nurse talking to you through the op and the anesthetist fussing around, plenty going on to amuse you. I took music player with me thinking I would listen to some music, but neve used it.