I saw this article in draft form sometime ago. I think Ben did a fine job of summarizing the rationale for cryonics and the scientific underpinnings. It's very hard (a least for me) to write an article like this because you don't have 500 pages; even the number of references you can cite is typically specified by the journal. Thus, it isn't so much a question of what you leave out, as what you have the good sense to put in. I think Ben did a good job in this respect. My congratulations to him.