This looks pretty nice, a bit ago my preferred planner/pomodoro app broke so I might use this.
A caveat would be having the top right menu be a bit more distinguishable, it can get lost very easily with some backgrounds:
http://puu.sh/n19Fx/b34d4c217f.jpg (With POM :Hovered)
However, this can be fixed using your favorite CSS injector so it isn't that problematic. I just added:
.view_item {
color: white;
}
.view_item_active {
color: #191919;
}