I purchased those for my Creality K2 Plus. I installed it a few days ago like any typical unicorn nozzle it changed without a problem. I've now been using it for a couple days running some lower end engineering filaments with carbon fiber and my prints still look great and I've experienced no issues. I'm not certain on the longevity as I've only had it for a few days.

seems to work well im printing pa612 cf 15

Been working great in our K2, the thermal conductivity is much better than ruby nozzles and worth the extra money to reduce clogs.

Was having issues with the stock .4 nozzles that came with the machine clogging and jamming. Saw a reddit post that this solved the problem, specifically with PETG. Thought I'd give it a shot. While i also took apart and cleaned the extruder before installing, I have not had the same issues (blobbing, clogging) I was having with stock. Prints seems to be coming out at the same quality as stock when they would print. Considering the amount of failed prints that happened mid print with stock nozzle, this so far was worth it price wise. Will update this review after a few more long prints to make sure it holds up over time.

Fits perfect, heats quick, I have printed with petg, pla, petg-cf, pla-silk, pla-cf. No issues, will buy again and am looking to see if it is available with .06 orifice. Very good value for cost. Easy to install, excellent build. Oe unicorn nozzles have clogged, but this has not.