We’ve used (and licensed) others. This is the best.

A usable migration tool has to be comprehensive — posts, pages, config data (the easy stuff) AND all users, plugins, plugin data (like TablePress data), themes, media library files (even 1000’s of files), multisite (every which way) as well as single sites. AIOM has IT ALL. And all of this without server extension dependencies. This is the best plugin for migrating and backing up sites and networks of sites. Bravo to the team at ServMask. And AIOM is FAST and ridiculously easy to use, btw. There should be a 5+ star rating for top-tier plugins.