Since TYPO3 truly separates content from a design and templates, building websites or applications has never been easier. There's no need to do dirty PHP hacking in template files because there are numerous template engines for TYPO3. Just choose the one that fits your needs best. With the built-in workspaces, you can run and try out several layouts simultaneously. You can analyze and change them continuously, carry out multivariate testing, or even redesign your whole application, while your editors can continue working on the current layout. Another advantage is that editors can start adding content immediately after the system is installed. They don't have to wait for the designers or the developers to finish their jobs.