As is typical, costs are usually understated and opportunities/savings are overstated. Also, those savings are projected over a long period of time. Things change over time....programs overrun, factors not originally accounted for come in to play, plans diverge, etc... And when policies start changing/being ammended, the original estimates are usually no longer valid.
I don't have the summary you seek but would also be interested in seeing one. Of all the info I've seen/read/heard thus far, coupled with the blitzkrieg passage that is continually attempted for reform of this magnitude, I dislike it more and more.