CrossRoads:
I don't think so - just uses names on the nets vs drawing lines all over the place. Easy to follow.
The IN and VCC/5V headers could have been drawn on the left side of the page to show signal flow a little better, is the only change I would have made.
It's not clear to me how any current ever flows in the collector of the phototransistor. It looks like there is a missing resistor.