Pros
Good pay for canvassers, soliciting door-to-door one-time donations instead of trying to get people to sign up for monthly credit card contributions on the street like most canvassing groups, generally a very positive office culture, get good exercise walking every day, working for a good cause, good experience for a non-profit career in the future when coupled with other qualifications, good opportunities to advance to field manager, opportunities to cross-train in other cities which can be a lot of fun and a good learning experience.
Cons
Harder to get donations in the current economy, responsible for meeting a quota, if you do not meet the quota often enough you can be fired, kind of cultish denial of turf having an impact on fundraising and general "drinking of the koolaid," but no more so than you'd get at any canvassing job.