This was my first *very good* bass, back in 88. I'm now playing a much more expensive instrument, but the build quality of the Jack is still incredible for the price. And I'm definitely keeping mine, even if I don't play it much anymore. Lightweight, tight sound, a real pleasure to play. The 5 string version is quite disapointing though.
One tiny trick: disconnecting the LED inside the control cavity increases the battery life ten-fold!