They have pretty awesome powertrains and the infotainment is decent. I can sorta see the allure. That said, I'd rather have the EQE sedan, the i5 wagon or maybe the EX90 if I was looking for an EV right now. We make a lot of decent cars here in Europe (okay I haven't really looked where any of those are assembled, but they're Euro companies at least).
As for the fart sounds - honestly that's one of the better things about the car if you ask me. The engineers had a childish sense of humour, big deal. So do I. I'd be more worried about the somewhat crappy interior quality for the price, or the lack of a speedometer near the driver's normal field of view.