I briefly had an NJ series Mockingbird - one of the models from around ten years ago, through neck, active, quilted top etc. The tone from the 2 P pickups combined was fantastic. Very, very growly. It's easy to see why Entwistle favoured that combination for so long.
Alas the neck dive was a bit of an issue for me and I sold it to a friend who wanted to learn the bass. Probably not the best choice for a first bass, looking back...
The current model with the cloud inlays seems to have the same spec. I'd love to get another one day and pop some DiMarzios in it.