Any data on their H6? I'm seven months into my experiment, early yes, but have no hiccups to report. Left town for three weeks, no precautions taken, and no problem.
In general, mass market replacement batteries are commodities, differentiated by price, warranty, and service terms. In that respect, WM is hard to beat, but anecdotal experiences have their limits, or at least need to be clarified -- is a WM battery an EP, Clarios, or one the Korean makes?
Same also applies to any brand that multi-sources, which is most of them.