Check my build thread, I'm using General Finish Satin. Initially, it just wouldn't cure and harden. It was gummy for about a week. Then it hardened rock hard. I don't know what happened. I tried another sample piece and it worked fine, hardened up in a few hours. I tried a third piece and it also worked fine. I can't imagine what happened the first time around.
But the stuff is pretty hard and it looks satiny. Not too shiny and covers well. Considering that the first test sample was gummy for several days and STILL hardened up, I figure it'll be just fine.