Well, I received my Level Two Center, and it lasted 36hrs. The end was last night when we were watching Modern Family and I was switching the center speaker setting between small & none trying to talk myself into the center, and my wife who was sitting next to me but was playing a FB game while watching TV said, "Ewww, whatever you did there, I don't like it". I engaged the Level Two Center from phantom. She never pays any attention to what I'm doing and can't hear even a large change, so when she said that, I actually laughed, explained what change I made and she said "See, you should've just left well enough alone".
For me, in my home, with my equipment and in my layout, a physical center speaker is the compromise solution. I suppose I could completely rearrange the living room, but that would require finding a new wife, and I'm kind of fond of the one I have. I could buy a new home, but that seems to be a little extreme just to add a physical center speaker. So, I took the easy way out and my theater sounds better because of it.
Out of curiosity, what are your mains?