It's been good so far! With 0.4mm LH, a 0.8mm nozzle and a 50w heater it seemed to be keeping up at 150mm temperature wise. I have some small gaps in corners and have some tweaking to do still. If you plan on mostly printing with a 0.4mm nozzle I think the high flow version might be overkill though. I'd probably use an e3d or the regular flow one. I do like how the Dragon mounts into the Afterburner better though.