Roaming profiles are ok, but are often more trouble than they are worth. I am in the process of doing away with them where I work. It seems we are always having permissions issues, etc. And yes, they can get huge. Also if you plan on migrating from XP to 7 any time soon, it is not a smooth transition because of the whole 'documents and settings' vs 'users', for placement of documents. Folder redirection is a better idea in my opinion, or just map their share to a network drive when they log in. You just have to train the user to save to the network drive, and not to the local hdd.