Bogdan's Comments:
Personally, I think it is the best book out there today. Loved the 2001 edition: it had nice paper - white and thick, very nice for side notes. The book was very well organized and quite condenced - 350 pages. At the end it has a powerful Math review with the most useful formulae; that was one of my favorite sections.
The Software is also the best of what I have seen: it is easy to use, helpful, interactive, and funny, which was very helpful to me in those cold winter nights as I was crunching math and verbal. There are about 4 tests on the CD, but you can really take them 6 or 8 times and still see new questions. (maybe my memory is bad?).
NOTE: The Tests that are on the CD are not scored the same way as the Official GMAT; you will be about 100 points off (below) from your final GMAT score, so do not let this fact distress you.
CD includes 4 full length practice tests, 9 verbal practice tests, 15 math review lessons, 9 math practice tests, quizes, a games, and a great fun interface.
Book Score: 5/5
Simulator: 4/5 (not representative, but tough is good).
--Bogdan