Really like what Fabien expressed here:
Is Symfony2 an MVC framework?
If you look around, every single framework seems to implement the MVC pattern.
I really don’t care whether Symfony2 is MVC or not. Probably because the MVC word is so overloaded and because nobody implements exactly the same MVC pattern anyway. The separation of concerns is all I care about. And if you like to call Symfony2 an MVC framework, then you should know that Symfony2 is really about providing the tools for the Controller part, the View part, but not the Model part. It’s up to you to create your model by hand or use any other tool, like an ORM.
I don’t like MVC because that’s not how the web works. Symfony2 is an HTTP framework; it is a Request/Response framework.
You have to be very discipline when you use Symfony2. Unlike other frameworks there are often many way of achieving the same result. I find myself thinking which is better often, changing where I place certain code and still lack the satisfaction and confidence that I did right. I am unsure where this and that should go although I will just say that given my experience with PHP I can pretty much make anything work. But. They just aren’t very sightly, if you know what I mean.