Here is my review for your product:

Pros:

• Facebook product, the quality is great
• Very safe, prevent runtime error is a great feature!
• Simple and easy to use
• Open source, everyone can contribute on it

Cons:

• Nothing for this hunt

My comment:
Facebook is now very clever and try to develop a lot of new product

For this product, I like to mark it as
8.1/10

Good work on hunting, thank for bring us a good product

(Please noted that it is my personal opinion only)