[Vlad]

Do not get confused, he means when he talks to a trainer to re-spec (i.e. remove his Holy and go Shadow) and he has to setup the bars all over again, so he wants a bar saving addon to more easily swap between specs with re-speccing and not the "duel spec" implemented system currently in, since that already does this.

His title was just a bit misleading, hehe. I was going to write the same earlier "what addons do you use?" but didn't reply as I am not sure of what action bar saving addon is actually good/popular these days... I use my own code. :P