ADVICE NEEDED – are PBN’s still worth building in 2017?

i ve prob wasted hours reading lots of "gurus" thoughts on PBN's. just about to build my first one with expired domains and real hand written content. not taking any short cuts on hosting, design or content.

area im still unsure about is buyingthe correct expired domains and not ending up building a PBN on domains with tons of spam links… (or does it even matter anymore)
questions:
1 – are pbns still worth building to rank on page 1 of google?
2 – is gsa SER still best to blast for…

ADVICE NEEDED – are PBN's still worth building in 2017?