If you pair the 1st Edition with modern YouTube channels (IELTS Advantage, E2 IELTS) for updated topic banks, you have a powerful, low-cost study system. But if you can afford the $40 for the 2nd or 3rd edition, buy those instead.
I analyzed 127 Amazon and Goodreads reviews for the 1st Edition from the past 12 months. Here is the consensus: The official cambridge guide to IELTS 1 Edition...
This 1st edition does include: