If you download the beta and try enting in a class, you'll find that it's very intuitive and easy to do.
It's based off of a container like structure. For example, each class has a number of levels. Each level is a "container" that you add things to. For instance the first two are add "Choose bonus feat" and add "bonus feat". The first allows you to select from a list of feats you determine, and the second just adds a specific feat at that level.
Feats are set up the same way. They are a container, that you add specific componants to. Features, same thing.
For evey feat, spell, item, class there is an HTML page created that you can edit and modify for use with the rules browser. How do you do a grapple again? What are specific penalties and modifiers for darkness? Click on the DM screen, click the appropriate section, and it displays in the browser. Much faster than going through the books trying to find the right page. Spells and feats in the browser work the same.
For looks, it looks just like a normal windows program, the marketplace function, which is part of the CHARGEN, looks very nice with graphical icons for every weapon or item.
The character sheet is dynamic. Hope that's not giving too much away.
Data entry is quick and easy. No need to purchase data set after data set only to have to re download them, then reinstall them, every couple of weeks. Just do them yourself....and have it work the way it's supposed to.
Definately worth taking a look at, especially since the browser is free! There are a lot of screenshots on the website that you can get a decent idea of how things will look and feel when the CHARGEN comes out.