Stick with mate, the first week may do ragged things to you psyche, but physically there may be some changes, your tongue may feel "fat" as your taste buds wake up again from being gassed etc.
so far it isn't too bad. I have noticed a deff improvement in taste, smell that's negligible as I'm still a bit clogged from the cold I'm getting over, and yes the craving are there but I try and focus on shit like cancer and emphysema to keep me not smoking.