The leather isn't too bad--heat wise. It has Sun-Reflective Technology that really works. Plus black leather just looks classic.
I compared it to my neighbor's C5 Corvette with the top off sitting outside on a hot weekend and the BMW leather was way cooler. TONS cooler! The Vette would burn your rear end and flesh while my car was tolerable. I'm sure the leatherette would sizzle leg hairs!!!!