YMMV, but as far as I'm concerned the most important part of getting the Ultimate Shave™ is the mindset you go in with. Personally I don't consider getting a BBS - a baby butt smooth, ie perfect shave with no trace of hair and no nicks - a necessity for getting an Ultimate Shave™ - to me the Ultimate Shave™ is a shave that feels great, make me feel invigorated and put a smile on my face for the rest of the day.
gotten shaves like that with my pot-metal Yuma razor, using whatever
blade was on top of the stack, the love-it-or-loathe-it Arko shave stick and my cheap as shit Turkish
"horse-hair" brush... but I've also gotten it with every other razor,
brush and soap/croap/cream I own as well.