I would say feathers, they are consistently sharp. But I prefer other blades too, I had good run with Red IPs and black 7o'clock. I'm not a fan of iridiums
I also find Red Personnas, Gillette 7 O'Clock Yellows, and Gillette Bleue Extras consistently top-shelf. I'm now testing Astra SPs and Gillette Super Thins (Thai I think) for consistency.
Then there are the vintage blades - you can't go wrong with Gillette Super Stainless / Spoilers and NOS Super Silvers (American and French).
Haven't had enough experience yet with injector and SE blades to give a solid recommendation, but so far Chinese Schick injectors and Ted Pella GEM SEs have delivered some mighty sweet shaves.
I think the most consistant blade I have used is the Vidyut Supermax Super Stainless. They give me a lovely 3 pass BBS and I don't have to think about it. They are also the only blade I have not cut myself at least once with. You can see the other brands I have tried, none of those have been truly bad TBH. That said I have a few more blades I want to try.