They are built way better are you crazy? Use them on the stick like you normally would and tell me they aren’t quiet. They have a 550lb working load.
Finally tried the KJ3 BREIFLY... I agree they are quieter when pulling the rope out, but I think some of the reason is the rope is a bit easier to pull out, more so once the tension is taken off the rope... this is not preferred by me, yet... Once I build more trust in it I MAYBE could grow to like that the rope comes out easier... remains to be seen. I obviously, don't want it falling down or off the tree.
I disagree slightly on being built better. Just my opinion, but hear is my stance on the KJ3 with comparison to the harken cleats - the KJ3 has open access to those components you say are built better. It's wide open with lots of room to get dirt and debris in there. I prefer how the harken is more enclosed.
Also the KJ3 requires a button head screw which the supplied one is too short for 1in square tube. I have access to socket head and flat head cap screws. The socket head works with thr KJ3 from what I can tell just fine. But that slowed me down for a sec.
I bought two and one of mine might be going back. The lower cam is tighter on the one. I know not to overnighter these, and I had to wait for it, but I'm assuming maybe someone else overtightened it or it is just defective. I haven't had problems with any of the 10 harkens I've used or the shafers either, which both work best with the flat head screws.
I have an open listing for the harken 150 cleats so I might also be biased, but not really I can simply say I prefer the harkens... so far. I really don't like that dirt an sh!t can get in there pretty easily.