Gets the job done

I am still playing with this, but so far it seems fantastic. I am using it to offer modal login/registration from my main menu and standard (albeit AJAX obviously) forms on my login and register pages. I am also combining it with the WordPress Social Login plugin to offer that ability and I am also using the WP-Members plugin. So far, all playing nicely but still need to test a bit more.

The only real negatives I have found are that some things which seem (to me) should be default behavior or configurable in options are not (e.g., the widget title and links text cannot be configured). The plugin can be manually modified to suit your tastes via your child theme, which is great, but unfortunately the documentation is still not where it ideally should be for this.

So, short story: if you want to use it the way it is designed to be used or you have the ability to do basic code modifications yourself, this is a great plugin.