Pros :

• Has ultra-fast pagespeed which is really convenient
• It does provide SEO reports and some server-side rendering
• You can easily get global network over HTTPS and HTTP2 in just seconds while hosting any HTML webpage or JS single-page app
• You can easily deploy them in seconds
• It does inject automatically while you take screenshot on a page
• It has instant cache invalidation which really helps rendering web page

Cons :

• A good tool which i don't find any negative comment.