I've used up to CS3 and never been impressed. I actually uninstalled it from my CS3 package. Like other WYSIWYG editors, it's addicted to inline styling, approximation, and often inelegant solutions to simple problems out of convenience. Some of the older versions build really horrible table layouts with spacer gifs and other monstrosities held over from the last decade, I'm dealing with such a case right now while revamping and finishing development on the backend of a proprietary cms and it's a disaster. These apps are fine for people who are making their own little personal websites, but they are really a joke for professional use even though a majority of sites are developed using them these days, which is ironic considering the price puts them way out of the range of a hobbyist. The cost of using a WYSIWYG in the long run is much greater than the cost of paying a real developer to do the job right the first time. Which is fine by me since I'm getting paid to fix the problems it caused, but still. : )