I was a little reluctant to try Kizer as I'd heard conflicting things about their quality. Traditionally, I've admittedly looked at Chinese manufacturers more when I was interested is budget friendly prodcuts and maybe a U.S. manufacturer was not an option. I think Kizer, WE , Reate, Stedemon, and others are really changing that though. So I decided to try a couple of Kizer models. I got my hands on a Feist and a Laconico Gemini and found them both to be excellent. It sounds petty but the little spiral pivot bolt drives me crazy. I just don't like the look of it, so I sold them. I still have a full-sized Sheepdog. I like the design and in addition to a great fit and finish, I've been pleasantly surprised by it being an impressive workhorse, performing really well.
While I'm not always crazy about some of Kizer's design choices, I like some of what I've seen in their plans (cleaner lines, simpler pivot hardware, etc.). Outside of the Vanguard line, they're not inexpensive though, so I'd expect them to perform well and we should be able to expect consistent quality. I'm still making up my mind completely, but so far so good for me at least. If you like a particular design, I feel like they're a decent option if maybe not my first choice.
For what it's worth, I've recently been looking at Ruike as a more budget option and have had awesome luck with them so far. The P801 is currently one of my favorite budget EDCs of all time. So I've been changing my opinion and recognizing Chinese and other overseas manufacturers who are bringing a quality product to us for a reasonable price. Also, it's not China but Spyderco's Taiwan ops have been killing it for a while argueably producing their best quality knives right now.
Good post and discussion. It's awesome to get folk's perspective on this.