I'v ever only bought one mag before, thst was Flyer, primarily for the classifieds. However I got this months Pilot for their specialon flying abroad - I found the article on western Australia particularly informative and since then I've contacted the school named and been happy etc.
I guess it depends on what you are looking for. At the end of the day they are trying to shift copies, spend a bit more time browsing all titles before you buy any of them. I only bought Pilot becaause of a recommendation on this forum for another Ppruner...
To be honest I think you can get anything from here on Pprune so why bother with the mags??
Slainte