Hello everyone. Maybe, this kind of questions are already done, but I would like to hear your opinions.

I'm thinking about buying the English Grammar In Use. However, there are so many types of them, American or British, with answers and CD-ROM, ebook and so on. I suppose many of you have read this book, because it's a very famous book all over the world. 

Please tell me your opinions. Which type do(did) you use?  How was that? need CD? Are there any big difference between former edition and latest edition?

Your recommend and so on.