[endymi0n]

Regarding SEO, your mileage may vary. At JustWatch we had the hypothesis that we can make a static Web App in Angular that uses SEO as the main traffic driver and is both more usable and more search engine compliant than a classic HTML serving backend.

So far, the metrics prove it's possible and we're quite happy with it. Interaction after slightly larger initial loading time (kept low via SPDY / HTTP/2 CDN) is much more snappy than the classic approach. Also, Prod/Dev parity is higher now that we're using exactly the same JS "build" in stage and prod.

Rankings are great, just prerendering took some more engineering to set up reliably than we thought. I can recommend the guys at SEO4AJAX, they've got great engineering and customer support compared to the market leader.