For this coming semester we will be using Brunner & Suddarth's 13th edition. I found the International edition for half the price. Yet, I hear good and bad things about international editions. Some say it's exactly the same, some say a few things are different. This international edition comes as a paperback and they turned the book into two volumes. Would you buy it? Do you suggest that I buy the regular edition instead? What are some of your experiences with International editions?