With the two I owned, the detent wasn't consistent, or what I'd call good with either knife. They barely flipped when you installed bearings, but still wouldn't open well, and required conscious effort to open properly. They would not flip well with bronze washers. They are the worst opening flippers I've owned so far.
They were about comparable to the Gen 4, which makes sense because I've never seen any confirmation from RHK that they actually changed anything in their detent over the years. I've also seen some issues with lockbar rock on the Gen 6, where you can feel and see the lockbar flex when you put pressure on the thumb studs or flipper tab before the detent breaks. This wasn't something I noticed with my Gen 4. It drives me crazy to see the lockbar on my new gen 6 wobble around when the knife is closed.
I was very unimpressed, especially for $425. I should have returned the second one like I did the first, but I ended up convexing/anodizing/ruining it as a beater project. Won't make that mistake again.