I find the ToolTips very useful. However, I cannot ever get them to work consistently. Sometimes they don't show at all, and other times I have to move away to a different file's tooltip and return to the one I am actually interested in seeing. There may be some logic that I am simply unaware of in activating them.
I am considering customising the new tag window to provide an alternative at-a glance view of important info, and then doing away with tooltips altogether if I cannot figure this out. Ideally I would have both working.