norton wrote an answer about Black Diamond Tempest Tent: 2-Person 4-Season on October 8, 2010
I used this twice this past summer to see how it would deal in warm weather, and when the sun comes out, you will to! It will get very warm, but as it's in the shade it stays comfortable with the vests open. I slept well in 50 F nights, but didn't do much sleeping in as the sun crept through the branches. I love it for fall/winter/spring. I'll stick with my 3 season next year. - oh, didn't take me too long in sealing the seams, and this thing is a waterproof tank.