Stripping all the stuff you can be it formatting or Java is a real bonus. I have taken pages down to half their original size using this and I would whole heartedly recommend slimming your code down by using CSS.
That size reduction helps with search engines as well as your bandwidth, it gives them more real content and not formattiing guff.
Having one CSS set of styles is a great thing to do. Imagine the benefit of changing one instance of a colour or font tag and all your pages are updated in one quick swoop. Fantastic. Once you start using them you will wonder why you did it any other way.