Looks nice and it is certainly a fresh approach!

BUT: It means I’d have a plugin more to look after and since I want all backends of all my WordPress installations (be it my own ones or those maintained for friends, customers etc.) to look identical, I’d have to buy the Unlimited Sites LifeTime Licence for $ 100.

I’m not saying that this is too much for what I’d be getting, but I’m saying that this is more than I personally am willing to spend for backend cosmetics. Yes, the default backend out of the box does look somwhat outdated, however I know by heart where I can access which feature and I can live with a “vintage”, yet very functional user interface…