I do, routinely. I get occasional admin challenge dialog boxes that are easy to deal with. Once in a great while, I'll have an issue with something quite simple

I do, routinely. I get occasional admin challenge dialog boxes that are easy to deal with. Once in a great while, I'll have an issue with something quite simple, like trying to save a Mail attachment to a folder in Documents, and I get a "can't do this because you don't have permission to write to etc.". Annoying, but happens rarely and so far has always been fixable with a reboot.