I liked this one-shot. Frankly, it's better than the bulk of the main mini. It made pretty good use of some characters that need to be used more, especially Sideways. The use of Dr. Light II was particularly clever.
Thoughts on Red Canary's identity? I've been figuring she's Sin, but the weird panel in the Univision spread that shows her as a female Captain Cold (Or maybe a Red Arrow?) is really weird.