Have They Seen Heaven?

I read an interesting article by Mark Galli called, "Incredible Journeys: What to Make of Visits to Heaven" in Christianity Today online.
 http://www.christianitytoday.com/ct/2012/december/incredible-journeys.html

The writer mentioned an article I read in Newsweek awhile ago: "Eben Alexander'sProof of Heaven: A Neurosurgeon's Journey into the Afterlife (Simon & Schuster) hit bookstores in late October, eliciting a cover story from Newsweek earlier that month."

I remember reading this story with some disbelief.
 Mark Galli writes about whether the stories these people claiming to have seen heaven agree with the teachings in the Bible.

 "For example, Neal said she was about to enter a hall where she would be given one last chance to accept or reject God. Traditionally Christians have taught that this momentous decision is called for in this life, after which comes judgment (Heb. 9:27). Alexander had lived a life indifferent toward God, and yet when he meets God, whom he calls Om, he is told, "There is nothing you can do wrong." So much for the doctrine of sin."

I believe some stories about people seeing heaven are true. Paul himself was taken to heaven, "I know a man in Christ who fourteen years ago-- whether in the body I do not know, or out of the body I do not know, God knows-- such a man was caught up to the third heaven." 2 Corinthians 12:2

But I think John gives us the best advice, "Beloved, do not believe every spirit, but test the spirits to see whether they are from God, because many false prophets have gone out into the world." 1 John 4:1