Really bad filament and poor support
Really bad and poor quality filament. I bought a pack of 5 and tried them out on my Ankermake M5C. I have used a bunch of different filament brands (Elegoo, Creality, PinRui, Landu, Eryone, eSUN) since getting my printer and all have worked flawlessly with zero adhesion issues. The two spools of Sunlu filament I bought just did not work at all, I could not get any first layer adhesion. Their response was to use a glue stick, which doesn't feel like it should be required given no other filament suffers the same problem. The common factor is their product. I had previously calibrated the Z axis and done a whole bunch of other dialing in, so I am confident their filament is the problem. A brand I will absolutely avoid. They refused to provide a refund so I went via my bank to complete a chargeback.