Homebrew PCBs

Newbie question, which I am sure has been asked before :)

I am thinking about using a perfboard like
http://www.radioshack.com/product/index.jsp?productId=2104052&cp=2032058\
.2032230.2032265&parentPage=family
<http://www.radioshack.com/product/index.jsp?productId=2104052&cp=203205\
8.2032230.2032265&parentPage=family>

and a conductive pen (like
http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1\
&storeId=10001&catalogId=10001&productId=263716
<http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-\
1&storeId=10001&catalogId=10001&productId=263716> ) to create the traces
between each of the components that I solder to the board.

Anyone have any experience with this as a technique?  I assume that if I
am careful and use a ruler, I can get reliable traces?  does anyone know
how thick (or how thin) of a trace you can make with these?  Does anyone
have any experience with a particular make/model that is better/worse
than anyother?

Thanks,

Steve



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