Depends what hero your playing. It's actually kinda frustrating sometimes if your playing offlane and trying to get the lane back and rubick keeps using fade bolt on the range creep since it sometime makes other creeps denials and pushes the wave to their tower making it hard to pressure the carry. The worst is earthshaker using fissure on the creep wave since not only does it push the wave it now creates a situation where you can't go near the creeps for 21 seconds without them going on you as they know shaker can't really help you if they do.

So basically sometimes it's worth it but it depends where the creeps are at and how vulnerable your going to make yourself by using that spell.