I cannot speak for the the complete BYD cars, but I can say their battery tech is outstanding. As well, they are rolling out the world's first 1MW superchargers, than can charge an EV in less than 10 mins. (I saw a YouTube demo. It is pretty wild.)

Yeah that's mostly what's having me hold off at the moment - next year the flash charging cells will be debut'ing in Australia. I honestly don't know if I even need the capability, but I'm anticipating some further price drops.