Building Sites with ExpressionEngine

Would be interested in having some technical people look at this site and give your feedback on using this as a CMS and how it could benefit clients.
http://expressionengine.com/
I would also like to get an idea of how it is different - (better/worse) than using Wordpress.
http://expressionengine.com/
I would also like to get an idea of how it is different - (better/worse) than using Wordpress.