I was worried this might be too advanced a topic, but you did a good job introducing new concepts and still fit everything into the limited time slot. Discussion of general error handling practices (not just for MongoDB) was also helpful. Based on the detail of Q&A after the talk, it seemed to be well-received as well.
Delivery for the first half of the presentation was a bit rushed, but the pacing got much better mid-way through. Covered a broad number of security topics with practical applications.
Excellent topic and delivery. I think this resonated with good bit of the audience, as folks interested in picking up new libraries and frameworks often still have legacy projects to maintain.
This topic seemed quite on point for a good portion of the audience working on client projects or in agencies. I think the content would benefit from more examples/discussion on extending CMS software (e.g. users that need to add e-commerce functionality to their CMS, or creating multi-domain deployments). Coverage of the PHP-CR and Symfony CMF projects was definitely relevant, and I think it'd be worth going into a bit more detail there in a future revision (especially as the project continues to mature).