Its a port and its free, what more does one need to know? Kidding aside I bought the 3E setting when it came out in the early 2000s. I think it was the softcover by AEG, the first one in that iteration. I took bits and pieces from it here and there and dropped them into a FR campaign with no modifications. There were rules for firearms too IIRC. I did not use the setting wholesale in its entirety, disregarded the history and cosmology, just used locations and NPCs, maybe some seafaring rules. I know this answer is somewhat vague but one thing I do remember is that I wasn't disappointed having bought it and did get some use out of it, so Im going to guess the PF version is similar.