It works, but it's nothing special. I feel that the difference in breathability between all WP/B clothing is small enough that I don't worry about it. Buy what fits, what works for you, and don't wear it when it's not raining.
If you're referring to the Kong Gigi, to my knowledge, it doesn't have an easy way to lower if your second falls on the auto-block mode. And you can't belay a leader with it. So it's a specialty device.