Anybody use these?

With the Florida Spring/Summer coming into full swing, I was wondering what other options there were for getting rid of the trapped heat of a full-faced helmet while having the added protection of a full-faced helmet at the same time.

They look like they'd be convenient if you ride to commute to work, school, etc and stop at lights often. However, I do notice that they're usually not Snell approved. I take it their 'crashworthiness' isn't as good as typical solid, full-face lids.

I also ask because newenough.com has some pretty decent deals on HJC CL-Max's for the solid colors starting at $108 before shipping.