I won one in a contest (yes, that is a claim hehe) and although I never tried it on, it looked quite trendy and I bet it does have very good ventilation - that was one of the first things I thought of when I got it. I also remember it being very light, although I'm not totally sure on that one.
PM DOJibber, I sold it to him and he wore it for a good part of last season. If you need a link to his profile, he wrote in my feedback, so find it there.
Good luck! Smith makes great stuff, so as long as it fits you shouldn't have a problem.