i have a chinook 2 and i like it alot. its not as heavy as the chinook 1. and i like it more than the chinook 3, the chinook is more of a self defence folder but ive used as my edc it performed really well, if you are going to get a chinook try and get the 2. the only difference to me is the weight. the 2 is slimmer than the 1, and, the 3 slimmer than the 2. and the blade profile, i personally prefer the hallow grind to me it cuts better. to me the only reason spyderco changed the profile on their knives is to save money on the manufactoring of the knife, buy their price has not reflected this to the consumer.