apostrophe-cms

Apostrophe CMS: Hosting questions + feasible to get into without Symfony experience?

I am looking for a clean, well-built CMS. I want to migrate a number of sites away from a self-built CMS which I will not be developing further. I've come across Apostrophe and instantly fell in love with the great, integrated user interface. It is based on the Symfony framework, which I have practically no experience with. My ques...