I have read a fair amount on this topic.
If you focus on the similarities there are some common themes from folks of a wide variety of belief systems:
—Floating above their bodies—being able to see things that they could not see from their lying down position
—White light and “tunnel”
—Greeted by “something”—religious icons, figures, loved ones, others
—Life review—successes and failures
More controversial is the claim by many they reincarnated in some form. This doctrine is controversial not just because it is opposed by many belief systems but because the alleged “rules” for reincarnation seem to vary widely and appear to be self-contradictory. For example some advocates claim you can reincarnate as animals or aliens on distant planets—other insist you must reincarnate as a human. If you pay close attention to the literature there is also the issue of whether reincarnation must be backwards or forwards in time or both.
The thing that bugs me about these accounts is the lack of empirical/rational care on the part of the person experiencing the NDE and the paranormal aspects of the experience itself.
I realize the people experiencing the NDE's are just everyday people, but their lack of deductive reasoning makes their testimony suspect even if it might be true.