The benefit to my students is that they will always have a resource to go to for information about our class; but the real benefit may be more for the parents as they will be able to get a feel for who I am, my teaching philosophy, and my assessment policies.
The only real concerns I have about the web page is that I am not going to take care of it as I should and neglect to keep it up to date. I don't like going to out of date web pages when I am looking for information about something, so I should set up a time maybe once a month or so to update it.