Toni has produced a very decent product which delivers the goods.
I personally like the duplicate file finder the most out of all the features, the registry cleaner I have found safe, but would not recommend any reg cleaner - I would reinstall from a clean system, but 'Regseeker' is good if you know what your doing.
also clear MRU lists ok,
IE history / Cookies cleared - which I find no use as I use Mozilla FireFox.

But I still give this a 5 Star rating.

Running under Windows Vista Ultimate with no problems. The features are well-configured and do a nice job of tidying things up on your system. The registry defrag feature is critical for Vista users, as the operating system makes a worse mess of it's registry than Windows ME used to. Good program, very light and at the same time powerful.