Ive been wearing the red head air mesh which is basically the same thing with the Ridgeline sable shorts and I found them great in the real hot conditions up in the Territory over the past 2 years. The long sleve shirt and long pants were good to keep the sun off whilst still keeping you cool and they are great when wet as the slightest breeze cools you. I also use them for the summer scouting of deer when its hot walking in the hills and I want to cover many kms.
The down sides to them which are minor is that they are not bug proof (which you could not expect them to be), and that they pick up quite a few spurs, seeds and sticks in the dry country stuff.