Recursion

Pleasantly enough written I suppose and mostly the characters are drawn OK.
But the main conflict in the book that the characters are fighting to overcome is that the premise is stupid. They never overcome this.
The plot comes off as a mixture of the movie Groundhog Day, Philip José Farmer's Riverworld, and John Wood Campbell's Invaders from the Infinite (probably the worst science fiction book ever written, though I have no desire to read other contenders to evaluate that claim).
Having a plot that is too twisted to be resolved, the ambiguous Capriccio-style ending strikes me as more of a simple cop-out than a bit of profundity.