I've got my dianese back protector sitting in the back of my mates dianese jacket and it's so comfortable i've ridden for 3 days with it and forgot it was there until I read through this thread.
I can't comment on the different/effectiveness of the different style tho. This one is not strapped directly to the body, but is inside the jacket. It's convenient not having to have to take it off/put it on which means you always use it without even thinking about it, even for the shortest ride because it's in the jacket.

They come in 2 different sizes for different jackets i believe, hope it fits in whatever jacket i end up buying.
