The out-of-the-box functionality is staggering and the response of the support team second to none. Many commercial support outfits should take a look at the Fabrik team on how to run their shop !!
For anybody who has ever looked at a database table or build webform, there is almost no learning curve. The forums are a fantastic knowledge base with a great and supportive community.
Do youself (and your customer) a favour and start using Fabrik for your web applications ... you won't regret it !!!