I think these magazines are really helpful, especially when just starting. I found the story's from investors like how they bought 10/20 Ip's in 2 years etc to be very inspiring.
I also think API is the better one and I was a bit disappointed with the latest YIP purchased the other day as it was crammed for of articles that I had no interest in like; Sourcing the Perfect Development site, Your Guide to State by State land tax, Your First Home, and others. There are a 1 or 2 articles that are interesting though like "Cheap & Easy Bathroom Fixes & Small Cost, big Yield.
The good thing about these mags is that you can come back to the articles that might not interest you now but could in a year or two.