Borrowed Power is a fantastic product that flesh out three character templates the channelers, the sanguiomancers, and the Skinthieves. Channelers draw power from ephermeral realms, sanguiomancers use vampire vitae to fuel magic, and skinthieves use the skins of beasts to change shape.
The tabletop gaming club found all three templates fun to play with, and well balanced. Using a sanguiomancer in your Vampire the requiem game is a great way to present your players a new challenge. We strongly recommend this product to all storytellers.