If Rickenbacker made an acoustic bass guitar, it might sound something like this.
Multi-sampled, with different velocity-levels and articulations, round-robin triggering of alternate samples, note-off noises etc.
You want dirt? I'll give you dirt! Turn the knob and the amp simulation kicks in.
Even better, there is a Kontakt script to do intelligent legato - you can simultaneously tie legato notes together and play polyphonic bass-lines (listen to the demo). Yes, you too can be Jaco.
The demo is played in real-time, no sequencing.
Uses after-touch (key-pressure) for vibrato and the mod-wheel for distortion.
The Kontakt script / performance-view has a "tone" knob which controls the mic position, and a knob to control the note-off volume.
There's even a custom skin so your Kontakt screen will look better than your mate's.
An awesome example of what great programming and Kontakt 2 can achieve!