I've not read any of Steve or Rhonda's work, but I'd be interested to check some out. Tolle does a nice job of presenting presence in an accessible way. He also is good about saying it's the teaching not the teacher. I don't "believe" in Tolle and that which his teaching point towards could hardly be called "his". He's just a messenger, but a good one imo.
Presence is a difficult thing. I find it's easiest after a run or when I am quietly by myself.