Putting myself at risk to come across as a "hater", I believe some remarks, and a fair warning, are in place. While that sunset is certainly nice, it was preceded by a considerable period of darkness, in which the radio went silent and the support forums offline, very inconvenient if clients (i.e. paying customers) run into trouble (the forums being the main source of troubleshooting as decent docs were persistently lacking). Before, support was okay, even though problems were often not really explained or resolved, and evasive or cryptic "yes, but…" answers were of frequent occurrence.

Basically, the plugin does it's job, but the code base is actually really messy, indeed with all sorts of functionality bolted on (a co-worker of mine once described YM as "a big ball of spaghetti"). Migrating to another system now being more urgent than ever, this proves to be a real pain, and furthermore reveals some of the intrinsic flaws which have existed from the onset -- a fact that probably contributed to the decision that refactoring the code base is not worth the effort (anymore). I could give examples, suffice to say I even found unhashed passwords in the transaction log, which is very uncool.

In short, I don't think YM is currently a viable option for WP membership management, considering the more elegant and streamlined solutions available on the marketplace today. Given the current state of affairs, and contrary to some advocates here above, I would definitely NOT recommend to use it on your site.