To be frank I found the Genius Guide to Feats of Multiclassing to be a bit underwhelming. Rogue Genius Games certainly provides a fair number of feats but most of them are very dull and I've seen much more impressed with multiclassing feats in other works. Two feats to get a couple of level 0-spells for example is rather disappointing, most GM's I know would give a character a few level 0-spells just for writing a half-way decent back story. While certainly there are a few gems here, most fail to really evoke the feel I think most people might have hoped for when they imagine one of the many dabblers in fiction. For the role player a single smite per day in exchange for a feat hardly invokes the idea of a pious warrior who turned away from the road of a paladin and is definitely not worth taking, particularly when it fails to build into any other feat, for the roll player. Worse most of them are so narrow they offer almost no utility leaving players with few opportunities to get creative with them. Some of these feats really work, but too many of these fail to make me really feel like a dabbler in another art and more like someone who vaguely remembers a highschool course they took on the subject for one quarter, 10 years ago. Most players will likely skip over these feats in favor of prestige classes which more fully realize their vision or just go back to swapping out a level here or there.
[3 of 5 Stars!]