Purchased this pickup to use in a hand constructed fretless bass. All the parts come with the pickup for a relatively easy installation, although the inclusion of springs or similar to push the pickup upwards would be helpful for those not replacing a pickup.
In terms of sound quality, it is exactly what I was looking for. The sound is warm yet defined, but even on a fretless responds with some power when the gain goes up. Harmonics are nice and clear, and the whole sound is never muddy. Definitely recommended for those who want a slightly more modern fretless sound.