As for a sock, Practical Sailor rated them. Northsails came out first, ATN second and Chutescoop third. As part of a "promotion," I got a Chutescoop "for free." The construction seemed so sleazy, I didn't even try it. I ended up getting a Northsails sock that arrived just last week, but haven't tried it yet. The construction quality seems excellent. If you think you might be interested in a sock, I'd recommend that you check out the videos on the Northsails web site, even if you buy another brand.
I have an asymmetric spinnaker with parrel (sp) beads on the tack that I think serve the same function as the ATN Tacker.