I'm on business in Ontario and I heard about the McLobster at McDonalds through late August. I tried it. It was actually pretty good, though I can't say I recognized much lobster flavor. But, I suppose that could be because I normally eat lobster dipped in butter and this was a different setting. You can see my experience here;

http://youtu.be/YjWT2ezb0HY

Anybody else try it?