Which is better? ACP internal medicine review course or Conrad Fischer Internal med review course? Help?

I am going to take the Internal medicine boards this year. I have medstudy, but I would really like to go to a live lecture and my two options are ACP internal medicine review or Conrad Fischer Internal Medicine review Course. Has anyone been to either of those. If you could let me know I would greatly appreciate it. I know conrad fischer makes things fun, and high yield, but its 10 days long, and ACP review course is only 4 days but they guarantee a 100% p rate. If you could let me know I would greatly appreciate it. Thanks