Well everbody else is doing it so thought I would try it.
For those who haven't seen it, I followed Duane's recipe for an APA.
3.5kg pale grain
0.15 carra pils
0.15 crystal
5g Chinnook @60
5g Pearle @60
50g cascade @ listed intervals 5 additions
and 20g amerilo at @0 - left sit for 25mins
Preboil gravity 1.048 - 15L
Fermenting SG 1.045
Tastes pleasantly hoppy and flavoursome
Couldn't be bothered working out the efficiency, but I think it's pretty ordinary.