If you peruse the other threads on this topic, the general opinion is that you should not use old material if you can help it, as you want to maximize your studying by only studying topics that are covered on the new MCAT, which are listed in the Official Guide. Some of the old review books go too far in-depth into topics that are either being omitted or significantly de-emphasized on the new exam. With that said, some people have been using the old books from TBR. This seems like it could be okay because TBR has not released a new edition of books for the 2015MCAT; they are keeping their old books and are basically telling people that their Biology I book covers Biochem as well. However if you decide to use TBR (or any other old edition book, for that matter), you will definitely need to be wise when studying the Physics and Ochem in these books, as they are likely to be too detailed.
Regarding new books, I have been using EK 9th edition and really like it. True, they are VERY concise (sometimes so much so that they don't really go into too much detail on some topics), but they do cover everything in a reader-friendly, engaging, and strategic way. Can't give you any stats or anything, as I've just completed content review and have yet to take any practice exams.
I'm also supplementing with some of the old TBR books for more practice and in-depth knowledge.