It's very good, I just thought it worth pointing out that it hadn't gone 400000+ miles on a single battery. Looks like they got close to 200000 both times.All under warranty and these guys are pretty harsh on the batteries. I believe they operate a car service between Las Vegas and LA.
So pretty much a worst case scenario. Most people won't abuse their car like that.
I doubt other manufacturers would do better under such conditions.
That's pretty damn good imo.