I've carried the Kershaw Emerson CQC-6K since 2015. I won it (and the matching trainer) in a giveaway here on PF back then and have carried it since. This knife gets brought up in threads here fairly often, and doesn't look to really have a thread of it's own. In my opinion it's the Glock of carry knives. It's inexpensive, decent quality, and does what you need it to. It's a regular knife that also lends itself pretty well to defensive work if needed. I use the wave feature just about everytime I open it in my regular life, and found no trouble using it when I was in a class, as long I wasn't seriously out wrestle/grappled. I've absolutely beat the hell out of it, and it just works. Kershaw has given me replacement parts more than once, and it's always been painless.
I was reading an older knife thread where a few people brought up using this knife, and thought I would talk about my experiences with it. In the world of defensive folders, I think this is a pretty heavy hitter for value as well.
Video is mirrored.