Pretty good for a white label battery. The 'standard' or 'norm' for a good quality has been 4 years for car batteries. That may have improved in the last few years because of several Yuasa owners have reported 6 years and up with exceptional care (never run completely flat, never frozen in a discharged state, never shorted, etc.).
White label batteries "generally" are the cheapos the dealers like since they are high profit (buy low, sell high).
Yuasa is probably THE BEST lead acid storage battery you can buy. I am too stingy so I have been using a brand named CHROME which is about half the cost of a Yuasa for my application. Still on the first one in the DT300i having replaced the original which was a white label, put there by a dealer that liked to "rob parts" off new, old stock bikes.