What are the differences between editions of level 2 first and second editions? First edition is now on sale, but would I regret later not getting the second edition?
I would strongly suggest that you get 2nd edition. If you are interested in the other materials that go with this book (audio, workbooks etc.), they are only compatable with the 2nd edition textbook. In addition, 2nd edition has had all the bugs from 1st edition fixed and has clearer grammar notes etc.
I would strongly suggest