I have had good luck with the filament that came with my Qidi as well as with other brands. But beware of fitment issues with aftermarket filaments. The spool holder on the X-One (not sure about the Tech One) is sized to accept the narrower Qidi filament spools and larger spools will bind... or you will need to leave the spool hold down screw loose or off altogether. See my other thread here in this forum to print a spacer for using aftermarket filaments.