Neville is going back to Copernic Desktop Search (via Scoble).
I've already discussed my reasons for using MSN. Personally, the more I use it, the more I agree with Neville. There's something - and I just can't put my finger on it - that I don't like about MSN search interface (the same complaint holds true for their web search engine). The results screen is generally cluttered and difficult to use, and there's just something about it I don't like. I've found myself longing for the clean interface of Copernic.
Looking back at my list, though, the one thing thing really keeping me on MSN for the time being is the shortcut keys. As I said, this allowed me to uninstall SlickRun. If Copernic were to add this support, I would probably switch back.