I got my VS via post before CNY installed it immediately on my 1970s rust bucket. Ive been using my battery since 2010. Only main difference I saw was when cranking it feels like new battery. Smoothness, well I'm not that sensitive to feel it. People say got diff btwn RON 95 & 97 I cant feel it either. Anyways Ill probably get another two more units for my other cars. Good stuff!