This one started off very strong for me. I enjoy characters who are willing to do whatever it takes to achieve deeply, passionately held goals. In other words, I love it when people do dumb things for love, be it love of a nation, an ideal, a false memory, or a man. I am intrigued by the idea of alternate realities, and passing between them, or choosing which one to make real.
However, this story fell apart in two ways:
Firstly, the magical technology didn't gel for me. In the end, it wasn't the "consciousness exists on another level, so people who know about the transition aren't changed" thing. That makes about as much sense as anything else. It was the fact that they would still have the money. Why would they still have the money? Money is either an idea held in electronic storage (not a consciousness, therefore subject to the change), an idea held in the minds of many people (who were not a part of the transition, therefore subject to the change), or a physical object (and therefore as much subject to the change as the molecules of the POV character's dead husband's body). In none of these cases would the reality hackers still have the money after the transition. This is a plot hole big enough to drive Kirk's Enterprise through.
Secondly, I'm a fan of the "be careful what you wish for" (BCWYWF, or "buckywif") subgenre of fiction. This story violated the single most important principle of the form: the main character must get something like his just deserts. In BCWYWF, the character must screw up somehow. Perhaps she ignores a warning and forges ahead with a dangerous course of action. Perhaps the sacrifices she makes to achieve her goals reveal some significant moral failing. Whatever it is, BCWYWF stories require that the character end up with something like justice, or at the very least, that there is some rhyme or reason to her ultimate failure.
Not so in this story. The main character failed and died... because she did. Thanks to a totally random, completely inconsequential mechanical glitch. There's no poetic (in)justice to this - just random chance. It's leaf in the wind all over again.
Anyway, I'm going to go ahead and switch over to the version of reality where the ending of A Small Matter, Really didn't let me down. Seeya later, suckers!