The short version is: this is a good book, with a few editing issues, inconsistencies and missed opportunities.
This product describes a new Craft formed by North American drifters. They trace their roots back about 200 years, and the thing they have in common is a dedication to The Road. It's a strong offerring, despite several typos (easy enough to fix in a PDF release).
While strong, it suffers from several things that are either missed opportunities or tonal missteps. The whole thing opens by discussing the ancient human desire to cross over the horizon. With this in mind, there is no tie whatsoever to the Void Seekers, the Convention that became half of the Void Engineers, and whose fundamental nature was the desire to explore and who were described often as having some sort of wanderlust. The next odd moment was when Spirit was mentioned as an Affinity Sphere. while it makes sense in general for a group of travelers to have Spirit, this product has very little to say about spirits or the umbra and how the Vagabonds interact with it, rendering it a bit strange. The section covering Focus could have used a bit more expansion as well. It mentions a new Instrument, but from the preceding information, I had expected "The Unending Road" or something of that nature as a Paradigm level entry in the Focus. That said, Focus is often hard to pin down, and rotes are one of the key ways to do it, both describing what sort of magick is done and how the group does it, and sadly, Vagabonds lacks any section covering Rotes or Wonders.
Despite these flaws, it's still quite good, and the NPCs described in it have enough detail to at least be guest stars in a Chronicle that stays in one place as they breeze into town, things happen, and then they breeze out.