I much prefer RDL's (with slight knee bend) and straight back as I'm very wary of my form with all types of deadlifts.
I think the way [MENTION=3627]Silverback[/MENTION]; is describing it would be beneficial for the lower back strength but as with all exercises, starting light is an absolute necessity. I'd like to try this style, just thinking where I can fit it in as I tend to have a fair lower back pump after deadlifts as is. The lower back seems to be a tough one to determine the difference between working the muscle and injury.