I have (and posted about) my experience with Yonico. Mixed at best with the "bad" ones going dull very quickly and larger ones being severely out of balance. I do and will continue to buy them when I need a bit for a specific project and don't need or expect a long life or want to spend a lot of $$
Same scenario for buying Rockler bits, they are "ok".
MLCS have been good as well for low $.
I only have one, but was surprised at a Wood River bit (3/4" straight cut). I know they are Chineseium and all the Wood River stuff (especially their planes) had big QC problems when they first came out, but they seemed to have clean up there mfg.
Bought from Woodcrafters when it was on sale.
The bit is one of my favorite when I have end grain to route, wicked sharp.