Actually, if you read the article (and the linked sources), it is clear that the current process is far from what might be considered good enough for brain preservation.
Yes, this is still very early stage. The people researching cryonics & co are very avant-guardists and still have much to do before the public trust them. People undergoing those operations today are betting their life and could be considered anvat-guardist too.
Whats reasonable to consider is that in a couple decade or so it will be a much more commonly accepted method to preserve the terminally ill; even possibly warp around time, for those that have the money and the desire.
I consider this topic extremely interesting, on par with space topics. Cheating death and reaching for the stars should be #1 lifegoal of the human race.