I like the MBV 555 but it doesn't taste anything like a traditional 555 to me. My taste perception of a traditional 555 is a rich, almost buttery hazelnut flavored light tobacco. MBV 555 has sweetness, but I get a strong maple flavor rather than a nutty flavor. I like the sweet maple flavor so I keep it in stock. In the performance category, MBV juices have been exceptional, including the 555. I have several bottles of their max VG min PG option in various flavors and they wick without any issues and generally don't terribly gunk up attys.
In sum, at least the way my taste buds work, for a "real" 555, the MBV version ain't it. It's really good (I was vaping it much of today just as a coincidence), but not really a 555.