Cube 3D printer community

Hi Dan,
I really thank you for starting this forum. It is really hard to find online communities hatching out ideas and sharing information about 3d systems printers.  I am going to attempt the bulk filament option due to the high price of the cartridges.  So far i am satisfied with the cube2 3D's prints.  (I was excepting less from a consumer oriented 'high priced' entry level printer.)
My question is about the bulk PLA filament options.  Burcinpak posted using makerbot's PLA filament.  On other blogs i came across people using Octave filaments but the quality doesn't seem to be too good according to the reviews.  What are your findings using various bulk materials? What i would really try to avoid is a clogged print head.
Thank you.
Best
Bobo

Cube2 3D
Firmware: 2.08 with leatest Cubify slicer