I love the JMJs, as a Precision player for many years the neck on them was so familiar it made the changeover to short scale so easy, however due to developing arthritis in my left thumb I’ve had to switch allegiance to the MIJs which I find less painful to play. In all honesty if I could have stuck with the JMJs I would have, but needs must and the MIJs aren’t a compromise, they’re great basses too.