"I am interested in people's reviews of Margaret Atwood"
Well, I read just one book of hers and wasn't terribly impressed with it (see below) and I have nothing but scorn for her dog-headed insistence that she doesn't write sci-fi because (and I quote) "if a book is realistic or plausible, then it's not science fiction"
which has to be one of the stupidest quotes in print, ever.
All good SF is both realistic and plausible and judging by the one book of hers I have read, most are far more so than the ones she is capable of writing.
Of course Atwood writes SF. Just not very well. Which is not surprising, since you wouldn't expect an author to be good at a genre she sneers at.
Anyway, my thoughts on Stone Mattress:
This was about old people doing old people stuff, which was all very boring. There was no effort (none!) to develop the few potentially interesting ideas to any meaningful level. Is this woman supposed to be a sci-fi/fantasy writer?
The fantasy elements were just add-ons to some very dull & geriatric stories. I kept hoping that the stories would somehow come together (as indicated by the shared characters of the first two stories indicated) but was disappointed.
The prose wasn't terribly impressive, either: "The quality of writing isn't impressive, either. "He's here, forsaken by her, abandoned. In time, which fails to sustain him. In space, which fails to cradle him.". Huh? 
If anyone is interested in the sort of social phenomena that Atwood explores with the story where young people are burning down old folks' homes with cries of "It's now our turn!", "Burn the dusties!" etc, check out J G Ballard's books. He does this sort of thing much better.
And I was going to read her book Positron but a friend told me about it: Apparently, this is a society with 40% unemployment so the solution is that people alternate one month in jail (huh?) with one month in a guaranteed job & nice home. A couple shares their home with this other couple who takes over the house when they are in jail and vice versa.
Leaving aside the complete unworkability of this scenario re strangers taking over incomplete jobs at the end of the month, the amount of resources necessary to feed half the population in jail, etc it then gets sillier - the woman is apparently an assassin for the state, killing the undesirables, has an affair with the man using her home when she is in jail, etc. I was still holding it all together when my friend said at the end that one of the dead came back as... ELVIS. What? 
I'm a big SF reader but I don't think Margaret Atwood is for me. Maybe when she accepts that she is a SF writer and tries to do it better 