Re: Wish I hadn't
"other users don't have access to apps already installed and need a google account to use the tablet properly"
While I haven't actually used it, this review specifically states that users don't need a Google account, assuming they don't want to do things like use the Play store: http://blogs.computerworld.com/android/21327/android-42-multiuser-support
Seems sensible to me, since you can set up an android device without one, if you so choose.
Also, "If one user goes into the Play Store and installs an app that another user has already downloaded onto the tablet, Android will "install" the app for the user -- basically making it available to her -- but won't actually redownload it".
I agree that it would make more sense to have a list of available apps that you can show/hide, but at least it isn't downloading dupes.
Though, how would you do this if you didn't associate a Google account?
I'm looking forward to putting this on my Transformer: the idea of an open "Games" account for guests is great.