If you are planning to do quilt that you are always happy with 1/2" bindings on then the Kwik Bind System really is quick.
If you are doing larger quilts and will want a range of binding sizes you might prefer the Ultimate quilt Binding. The process is 2 step but the results are professional. So not quite as quick but very versatile.
Here is a link to videos that might help you decide.
http://www.annthegran.com/Product.aspx?t=1&i=2226 Ultimate Quilt Zip bind
http://www.acidplanet.com/artist.asp?videos=519310&T=9960 Kwik Bind
Hope this helps.