Depends on who you ask...
For me, sputnik, voshkod, rapira et al were just too blunt! They tugged like hell and were just so uncomfortable! The end result was barely a SAS! 
Others just love them! I see voshkod gets a lot of love but yeah, too blunt for me. The least sharp blade I can use and get a decent shave is the Gillette Wilkinson sword (Indian). 
Apart from my daily Polsilver, I also like the Indian blacks and Indian greens. Feathers are good for my stubble but horrible for my skin.