I have grey leather in my 2003 Ford Focus ZX5 Premium. I love the leather.....the seats are heated, great because I live in Northern Ontario. And, I've never had a problem with them in the summer, I have tinted windows and the interior of the car stays relatively cool.
Leather, much easier to clean, looks better and is much more comfortable than cloth, IMO. Ford's choice of leather grade has always been good and above the norn. Very durable, looks good too!