This is such an amazing deal. We have a 19 month old, trying for another, and I seriously just bought it for the sheets. It's like buying two sheets and getting the rest of the stuff for free. We'll hold on to the swaddle sack for when we have another USB 3 and I don't care if they're the wrong color, I like the swaddle sack that much.
We had a couple of the non swaddle sleep sacks for our son when he was a USB 3 and didn't get much use out of them, he was a swaddle addict and I didn't see the point of putting him in a sleep sack and then a swaddle on top of it. But seriously, this is a stellar deal. I've already facebooked to tell all my friends that they need three of these.
edit: wow, I've apparently never wrote n o 0 b before because I had no idea woot corrected it to USB 3.