One thing needs pointed out first: my first grow, plants were massively stressed by a succession of different things, and in the end I was just glad that there was something to harvest at all. Not the plants at fault here, just my utter newbishness.
That said, the Critical Kush was by far my favourite in this grow. Tasted really nice and was very strong.
The plants took about 4 months from seed to harvest - but the only reason is that I stressed them so much (although not intentionally), that pretty much doubled the veg period. I'm sure they're a lot faster in an experienced grower's hands.