Nightcap, in my opinion, isn't as strong nicotine-wise as a lot of people claim. It is definitely full in flavor, latakia forward, and funky with perique. There isn't anything subtle about it, that's for sure, but you aren't going to like... black out for an hour after smoking it or anything.
I recommend it to everyone! It burns great, like all the nice ribbon-cut Dunhill stuff, and the bulk is the same as the tin - to me anyway.