Originally Posted by HomerSimpson

advantages
- plugins - lots of those that will help you modify WP into whatever you like
- themes - lots of free themes - lots of cheap and nice looking paid ones too
- maintained open source code
- can be very secure applying a few tricks
- easy to maintain and upgrade...
- easy to backup (especially with wordpress to dropbox plugin)

so in general it's GREAT platform and def. my favorite one...
I have great experience with WP and I really like working in WP...
If there's no need - don't develop anything custom - you're just wasting time and money...