2 of the 2 rolls I've had with Octave have been bad.
I went through several dozen meters of the black octave before I thought to try another brand, and saw what good filament was. That black stuff would not bond and extruded far above typical temperatures.
I then went through 1kg of white zentoolworks filament; it was superb.
I then went through about 3lbs of my 10lbs roll of AcmePlastic filament,, it was super. It's in the furnace room at home in massachusetts (very dry) and I look forward to getting back to it.
I used another 1kg of Octave White, and I ignored the problems for ages. I thought it was a problem in my system. I've finally got a new filament in and realized it's indeed a fault of the filament at least in part. It needs 210C (240C) real to extrude, and cakes to a gray very very quickly. I also sometimes see black flakes. Wth?
Struggles! I am doing alright with a $39 roll from Inventables, but it's still early to say for sure.