I just did some slo-mo on some pretty bad green-screen footage shot on a D90. I used Time Remapping with Frame Blending (Right Click on the layer–> Time Remapping–> enable time remapping, Frame Blending–> Pixel Motion) and it looked pretty slick. Time Remapping is a little tricky at first but well worth learning, much better results than any of the effects. Basically just make a keyframe and then drag it out!