Well, I'm still here! Beyond feeling a bit weird and spaced out on occasions (it's not something I can put my finger on, it just feels a little "odd"), and a little (okay, maybe a lot) increased irritability, I'm doing okay. At least I'm not (so far) suffering any of the major side effects.
I have noticed there have been a couple of occasions already where I'd automatically spark up, but then thought nah, won't bother. Could be psychological, I guess, but doesn't really matter if it's slowing down the fags.
Last of the single 0.5Mg tablets today. Onto two of those a day from tomorrow.