The most munchkin player from my last campaign had that book. He took the most gawdawful spell I'd ever seen - Celestial Brilliance, I think it was called. Basically gave him a 60' radius of brilliant light that did massive damage to undead within radius. And it lasted for like hours, I think.
Just absurd.
While I was reading XRP's Magical Medieval Society:Western Europe, they talk about the concept of a Mendicant, and I thought that would make a pretty cool character concept. Mendicants are traveling priests who deprive themselves of the pleasures of life, and pretty much beg for all their food and shelter. VoP would be a perfect choice. But, I don't have that book, and I doubt I'd buy it for just that one feat.