Dart jump cues
[First off, any 40-42" Jump cue can be used using the 'Dart' technique.
I have only seen 2 players that are even halfway proficient with them. Surep, players can make balls sitting in front of the pocket, or they can hit the object ball even from a close jump, but try making objects balls in the middle of the table with it, or long jumps with it. I have found that the 'Stroke' technique is more accurate, except for maybe, very close jumps (3" or less).
The real light jump cues especially designed for the Dart technique can get u over the ball, the problem is being able to make anything with them other than what I described in the previous paragraph.
I have a J&J Break/jump cue, but I have owned 2-4 other jump cues, and have tried several models of the jump cue. The best all around jump cue for getting over a ball with real good accuracy was with the X-Jumper, which is now defunct.
Another point to make, is that you should not always assume a jump shot will have the best result. Many times I realize I can hit the object ball, probably not make it, and that a kick shot gives me a better chance for a tough leave than the jump shot would, so I end up kicking.[