When I open them myself I do have to select a sound source for the master bus.
A few projects won't trigger sounds because the gates get in the way (such as metal quick kit). If you play with the tomtoms with your mouse for instance the (moving the mouse up and down in order to increase velocity) hearing a sound can be a hit and miss affair.
Also MIDI triggers aren't consistent across the templates I think (meaning drum pads need to be retuned to right MIDI note).
Still this can be tailored to our requirements, it's free and it's good...