The Bosch 3 electrods always did the job for me on my '97 1.8T.
My car started misfiring a couple weeks ago though and that's when I saw I couldn't get those from ECS- they were replaced with a 2 electrode. Those did not work- very bad misfires. I tried closing up the gap, but it wasn't easy, and I'm not sure you really can (hard to gap because of the design). I ended up having to go to Autozone- Autolite (yea, I read the story, but I needed to get home from west Michigan). I closed up the gap to .028" and they did the trick. I need to get some plain copper plugs though- NGK's I guess.