Krista Wilson Muldoon wrote an awesome review of these “Knifty Knitter” knitting templates for Cool Tools:
The problem I have with regular knitting is getting started. With a hat, for example, I have a lot of trouble getting my size just right and having the first row look neat and not sloppy. Knifty Knitters completely eliminate the size problem and allow you to make the first row just as neat as every other row. Each loom is basically a round circle with pegs on it. Since you are wrapping the yarn on preset pegs, the problem of keeping the stitches the same length is eliminated. I made my first hat while watching a movie. As you work, your hat starts to build up and hang down underneath as you go, which is pretty neat to watch. When it is long enough (the directions tell you how long for different sizes), you use this plastic needle to thread a piece of yarn through the loops at the end and drawstring it tight and tie.
Knifty Knitter review on Cool Tools – Link.