I've been playing this for a few months now and it's become my main bass, the sound and feel are just right. The balance on the strap is so good it just stays where you put it. Because of the reduced body it's easy for me to reach around to grab my flute (I have to do this mid song at times) nothing gets in the way. The sustain goes on forever.
My thoughts on the headless bridge etc :
The string spacing was wider than I wanted so I had to grind bits off the nut and use the bass' original plastic nut to set the spacing, the string retainer seems to work well. The bridge is good, I had a Hohner headless years ago and it's not quite as good as that but ok. When new the bridge saddles needs a bit of sanding down to stop them jamming against each other (I had to drill out the holes in the string retainer too) When tuning some of the knobs are a bit stiff, I have strong fingers but it can be tricky. I need to investigate oiling or greasing the appropriate parts. I'd give them 7/10 as they came out of the box , 8/10 now.