No experience of hypnosis, but I have successfully given up for good.
The key for me was plenty of NRT for a long time. I literally never, ever denied myself. I used lozenges for 14 months and then patches cut up gradually smaller for the final two months.
Last cigarette 31st Dec 2012, no nicotine from April 2014
Something definitely has changed in my psyche. I was not 'trying to give up'. I was/am very definitely never, ever going to smoke ever again. I don't miss smoking, I think in only negative ways about smoking, I pity smokers (sorry, no offence meant) and an revolted by it all. A significant mindset change happened that was nothing to do with the physical addiction that meant it worked.
I mention this because it is possibly a similar state that hypnosis aims to create? If so, it should be great. But expect to need NRT as well.
Give yourself the best possible chance by doing everything. Hypnosis, the Carr book, NRT long term, in the beginning (or if you are going out) you can really overdo NRT with patches and lozenges for example. Do everything. Don't rely just on hypnosis - do everything you possibly can to make stopping smoking as easy as possible.
IMO most fail because they consciously make it difficult for themselves by not using enough NRT for long enough. There should be no I satisfied cravings. Ever.