>>95950488 (OP)That's the 3e version, which is completely unrelated outside of the name (picrel is the real one).
I'm currently halfway through running it (though with 2e instead of 1e or 4e) and we've had a lot of fun with what it offers, though parts of it are kinda rocky and don't do the best job with communicating what they want the GM to do. Expect that you'll have to flesh a lot of the scenario out yourself, when the adventure turns more investigative.
Otherwise, it's a really good showcase of what the WFRP world is like, just be prepared, because it's really long (5 or 6 books depending on the version you're running).
There were two releases of the campaign, one for 1st edition and one for 4th edition. Personally I went with backporting the 4th edition version to 2e (my preferred version of WFRP), since the PDFs have higher resolution art and handouts as well as a base rules system that's closer to 2e. Though if you don't want to convert and just want to use it as is, 4e is an OK ruleset.
>TL;DR: It's quite good, but not perfect and use the 4e version backported to 2e