I have this gi. It's not as light as the Gameness Air, but it's still a great gi. I'd say the Summerweight is actually closer to a normal gi than a lightweight gi.
The stitching is fantastic. The weave can be mildly abrasive when soaked with sweat, so if you're tender-skinned a rashguard is nice. Best collar in any gi I've worn. Pants are sturdy with a traditional drawstring and are not ripstop. Comes with nice patches that you can put on if you choose.
I'm 5'7" and 150lbs and I wear an A2. Does not shrink much at all.