sed and awk

i don't know how complex (or tons of functionality) awk has, but i know sed has a little too much for its own good
it has always been difficult to understand the various options with sed

anyway the reason for this post is this article explaining sed and awk
http://www.catonmat.net/blog/awk-one-liners-explained-part-one/
http://www.catonmat.net/blog/sed-one-liners-explained-part-one/

finally someone who tries to demystify sed
or may be the only article that i have found during my short span with this electronic device