I actually have the Brookstone "space" bags and some Samsonite brand of the same item (from Costco). Those Eagle Creek packing cases look intereting .I find that when you squish the air out it just makes more room to take more stuff and then the bags are really heavy! If you pack with things carefully folded (Shirt collars inside for example) the wrinkles are minimal. Those bags are really great for the dirty laundry on the way home too. If you aren't careful, call Tony for lessons on using the Rowenta!
I like that the TSA people aren't handling my stuff with their gloves that have handled other peoples dirty clothes too. I'm pretty finicky about that.