the esun epc is probably one of the nicest filaments i ever printed with. super strong, higher temp, warps slightly less than abs. other polycarbs warp absolutely terrible and are almost unprintable. whatever esun did to their epc version they did it right. i love the stuff. only problem is its only avail in a natural cloudy white/clear. its also flame retardant. i printed all my extruder parts out of it to lower the fire risk if a thermistor fails.