Already perfect and still improving

The app works well and the menubar icon looks nice. It replaced Caffeine on my Mac, especially because this app support Retina displays.

******EDIT : the feature described below was added in an update => fifth star added to my review !********
There is only one major shortcoming : activating Amphetamine requires two clicks, instead of one for Caffeine. It gets a bit irritating over time. It would be nice if users could set a default duration, and if theyd want to choose another duration, theyd right click on the icon.

Gabdown about Amphetamine, v1.5.2