The Back-to-Basics mill is a nice, little mill. It's not very fast, and it has a small hopper, but it does mill a nice flour -- as well as cracks grains for cereals. For the money, it is a very good mill, IMO.
I am thrilled to have the Whisper Mill. Hubby ordered it for me, and I originally thought it was an extravagance (and it's anything but whisper quiet -- sounds like a jet taking off in the kitchen!), but I quickly came to love being able to grind large amounts of flour so quickly.
If you have the money set aside, an electric mill is really nice to have.