This is a fantastic game and probably the best side-game produced for nWoD. Geist provides a well-thought-out framework for a system that is very malleable.
Essentially, the characters play individuals that are given a 'second chance' by a Geist - a creature from the afterlife that exists as a conceptual archetype. The alien nature of the Geist is chilling and the opportunities for them to pursue their own agendas (often at the expense of the host) provides a wealth of roleplaying opportunities. The rules are all internally consistent, and convey the balance of celebrating life under the shadow of death quite well.
The Krewe structure (Krewe being a group of Geists) is well-explained, but with enough blank space for the players to fill in the details and really personalise their group. However, my only reservation is that there is blank space that needs to be filled with good ideas and a decent amount of planning needs to go into the construction of the Krewe's unique identity.
Overall, I'd highly recommend this game. This isn't something with a short shelf-life, or something to play in between other games. Geist deserves solid attention and would be perfect for a long-term chronicle.
[5 of 5 Stars!]