I just got done with my Steels 2 course. We used Geschwinder's text, sparingly at best, the professor tended to teach from his own notes. For Steels 1, which I took the first semester the 13th ed came out we didnt even use a text. Although now steels 1 is using the segui text. Personally I would wait for this new salmon and johnson book to come out, or else I would just buy the old version and use that one, which is allegedly better than any of the new texts despite being out of date.