Really good presentation with focus on giving an overview rather than focusing on specifics -- just what I expected (and was hoping for). Still a whole lot of material was covered.
+ spent the time needed on the type system - as mentioned in the talk, this is the major feature of Hack,
+ several opportunities for questions during the talk,
+ the "demos",
Great presentation with a really good explanation of the types differences and how to use them. Covered a lot of material but it didn't feel rushed.
Nice presentation.
The GOOD:
- very good idea splitting in intervals for questions.
What I would like to have seen:
- some example of interop with PHP (for example with PHPUnit).
Nice and awesome talk :) . I like how slowly and consistently you are explaining things, that helps to understand it clearly for newbies like me.