I have a couple of Simeon Customs (yeti and a goblin), and am quite happy with both. Enough so that I keep an eye on his work and hope for an excuse to snag another.
I found Jamie (maker) pleasant and easy to work with. I felt like I was getting hands on attention from somebody that took pride in both his business and product.
Knives themselves have excellent action (this seems to be a focus of Jamie's and he nails it). I'm also surprised how well the low profile flipper tabs work even without jimping. Blade grinds are complex and interesting. And mine came wicked sharp.
All around, as I mentioned above, I'm a fan.