I actually have a little experience with both Barron's and Gruber's and they are both pretty good books. Barrons was good, but I honestly think the questions were a little easier than what's on the real SAT, so don't go just by the questions in the book. Grubers is seemed like it was a little better when I flipped through it (didn't use it as much, more just for extra practice), but it seemed like the questions jumped from being too easy to too hard. They both have a typical reivew of subjects, but looking back, I guess i'd rather have questions more difficult than what's on the test so the real SAT is easier by comparison. I took it a 2nd time and did way better though. It's different for everyone, but for me, I hate standardized tests so I almost planned on taking it a 2nd time. I actually kind of enjoyed studying for the 2nd try b/c I had a benchmark and knew what I needed to study, rather than just trying to study everything equally which takes A LOT more time.