Pros:
Reduces environmental waste of precious water resources. I am a bit peeved at 7th Generation for their more recent public statement that cloth uses more water -- 20 years around the block and I am telling you that is a bunch of shitake mushrooms.
Reduces large amounts of manufacturing and transportation resources, the waste puck up and disposal maintenance.
Reduced rashes
Reduced Dioxins and other chemicals that negatively impact the body when absorbed through the skin.
not linked to asthma
not linked to male infertility
workers in production of cloth diapers don't complain about working with the chemicals and making them sick.
now the fun stuff:
saves you money --- unless you abuse the addiction.

can be bought used and new, just like a car. who wants used disposables?
most designs are relatively easy to use and launder
the is an abundent amount of resouces available to help you transition.
mistakes are MEANT to happen when learning your groove and you only become better at it.

good for the skin, more comfortable, breathable
big diaper butts are way cuter than tiny little disposables (ok, I am a little biased)
available in more varieties these day than disposables. (yeah for the wahms and cd industries and all their hard work to take back that slice of the pie)
just cute, fun to shop for
Good luck on your decision to cd.

cons:
only if you don't have a washer easily accessible.