I'm not easily impressed with most new tools, but this one was exactly what I was looking for, very simple to use with a nice interface. And seems like you can buy a lifetime license. Let me know what you think about it. http://www.save-o-gram.com/
Come on guys, not one of you liked this tool? You can either download certain pics and videos, or download them all in a ZIP file. You can test it with this site for example: https://instagram.com/alexanikolas/