It's true that I do all my development in the class browser but I don't recommend it for everybody <s>. It can be a dangerous place, in the sense that it's pretty easy to subclass something without too much thought...
I also live in Rational Rose, in IE, and in Outlook too <s>.
By the way, it bugs me that I forgot to mention in my second Browser session that you can
DO (_Browser) WITH ,,.T.
which brings the sucker up in listbox mode (not treeview) and that's more stable for some folks on dicey harware/software setups.