I'm a long time user of the original Mustang Micro and have been using it daily since launch.
Despite its durability issues, the original Mustang Micro had a very elegant simplistic approach in functionality and user experience while maintaining very useful fine tuned tonal options that for the most part sounded good to impressively good without the need to tweak or any hassle.
Well, the Mustang Micro Plus its the polar opposite.
It offers loads of options, with the need of pairing to a mobile device or tablet, much more flexibility while at the same time sounding worse.
It has much more digital artifacts, sounds inorganic and has that digital sizzle that is always present (user of old school Boss digital multi effects will know what I mean).
The need to have a second device paired for tuning is another hassle, its not a all in one solution anymore, the app (on apple devices) is buggy and require you to make an account to use all features.
All in, this is a device that will tick more boxes that will please some, while introducing unnecessary complications to a previous more elegant solution.