expressionengine vs codeigniter

[eluser]yelirekim[/eluser]
I've adopted CodeIgniter as the standard launch pad for all of my new projects, I made the switch about 10 months ago and haven't looked back, it's a great framework, period.


I can't help but wonder though: is there any huge advantage to using expression engine over codeigniter? I'm imagining, in a perfect world, that I would be allowed the flexibility of codeigniter, but with built in support for a CMS, it's just a little difficult for me to imagine how all of the pieces would fit together.

So my question to the community: did any of you start with codeigniter and move on to expression engine? What are your thoughts on that process?

My challenge to the EE dev team: sell me! Tell me everything wonderful there is to know about using EE and why I should make the switch. I'm hoping that there is good reason to and I'll be able to streamline development processes even more.