After two fantastic shaves with what I thought was a personna med prep, I discovered I had been using a Sputnik for the first time ever when I disassembled my razor to clean it yesterday. That says a lot since med preps are highly regarded in these parts. The fact that I had no suspicion it was a different blade is a true compliment. Today was shave #3 and 13 hours later I still look good, with minimal stubble showing. I've tried a good 25 brands of blades and love the Russian steel regardless if they come from Moscow or St Petersburg. I would say Sputnik are to the Moscow factory what Nacet are to the St Petersburg plant, and Nacet are my #1 blade. I have some Rapira to try yet, so that may change, but either way, these are a fantastic blade well worth the money. More sharp than smooth at first IMO, and the first shave lets you know it, but the second and third have been smoother and every bit as efficient. Anybody else a fan of these?