[empire29]

Quicksilver is probably more powerful, but Alfred (to me) seems much simpler and there's a lower barrier to entry.

Where with QS I had to "think" whenever I used it, Alfred's interface, in the parlance of apple, "just works".

[jamesjporter]

Really? Quicksilver has always felt like a natural extension of my brain. Then again I've never tried Alfred, so maybe I just don't know what I'm missing.