You should do it. It can sometimes be pain in the ass and it takes a long time. It took us several months to finish, during the process your house will be a huge mess. We donated bags and bags and bags of stuff. It is truly amazing how much crap you can unthinkingly acquire. In the end it was totally worth the trouble.

Get the book and make sure to give it a full read-through before starting. The order you do things matters quite a bit.