Heh. It's been half an hour and no flames yet, so I'll add a bit more.
But first:
THE FOLLOWING IS NOTHING MORE THAN MY PERSONAL OPINION BASED ON MY EXPERIENCE AND THE OBSERVED TRAINING AND WRITINGS OF MUCH STRONGER MORE EXPERIENCED LIFTERS. I RESPECT ANY DISSENTING OPINIONS AND WISH YOU ALL A SAFE AND HAPPY HOLIDAY SEASON.
You have to decide when to use straps for yourself...like IPF champ Alexsey Vishnitsky in this vid of him using straps with 881 lbs.
http://www.youtube.com/watch?v=xdFlfmmLMbs
ZKP sums it up very well in the preceding post.
And straps have a "grip-sparing" effect. The thing that makes deadlifts so deadly on the CNS is that they tax the grip so much. (USAPL champ Jack Reape has speculated that this because the hands have so many nerve endings as a large portion of our sense of touch along with our fine motor skills are wired to our hands.)
Personally, I'm prepared to use straps for my next round of deadlifting volume. I'm going to be doing an insane number of sets to regroove this lift which I've ignored for three months as I've focused on my squat. Straps will allow me to build some serious deadlift-specific motor patterns with appreciable weight and stupendous volume without my grip giving out and limiting the load to my hips and abs. But this is to address a specific weakness. My grip has not failed me in the deadlift; my ability to lock out my hips has. So I need to work on that next with overloading the hips with heavy ass deadlifts.
BUT IF YOU PREFER NEVER TO USE STRAPS THEN I UNDERSTAND AND COMMEND YOUR TRAINING CHOICE.