Pros:
-main build system automation system for the Fedora project
-organizes/builds packages using tags 
-great for multi-team/multi-repo organizations:
  -tags support multiple inheritance (each tag has its own list of valid packages (inheritable))
  -package ownership can be set per-tag (inheritable)
-build target names remain fixed, as tags change through releases
-build targets (like a platform or dist) can have dedicated buildroot and packages based on tags
-can be scaled up for very large (busy) build systems (multiple workers)
-more service/queue based
-services can be split out to multiple server roles (later) if needed
-can integrate with Spec-File automation systems (like ReviewOMatic)
-uses postgreSQL DB
-recommended by the head of the Red Hat Fedora Project (Jessee Keating)

Cons:
-somewhat daunting setup (but there is good community support)
-uses postgreSQL DB
-heavy weight application (might need it's own hardware)
-needs LOTS of disk space (under /var/) with plenty of IO (not VM friendly)
-requires either kerberos-auth or client/server side SSL certs