I believe his experience was authentic. I don't think he's any kind of con man. Sometimes I don't like some of the details of his writing, or the spin he puts on things. I think the Zen traditions have the most highly developed methods of teaching along the lines he's talking about. Talking about deep spiritual truth in a direct manner doesn't really work. Explaining how to fly a hang glider will get you very little traction when it comes time to actually fly a hang glider. So, to me, there's this huge separation between spiritual truth and the ability and methods of teaching it. Tolle's right, and paying attention to your body and such is good, but it just falls short.

I'd recommend the Zen Teaching of Huang Po, and the practices of Zen in general, Rinzai zen in particular, especially koans, which are easy to neglect and were a brilliant stroke of insight. That's really skillful teaching. If you can wrap your head around Huang Po, you'll be closer to what Tolle is talking about. Huang Po is dead-on like nothing else I ever read, but it didn't make any real sense to me until I didn't need it anymore. And I believe Hakuin was right in his belief that the most effective way for a student to achieve insight is through koan practice. Rinzai zen is most on the mark.

The main problem with Zen is that it's not well packaged for a modern Western audience, but it's the best we've got.