For what its worth - and to be clear: I'm not nominating the Vader as the best Kiesel or anything, its a nice little bass and like their other instruments is well made.
There's little details here that just add to the overall quality that you don't find on allot of other instruments unless you pay for premium appointments.
Case in point: I just restrung the Vader with a set of DR Legends flats. While I had things "opened up" so to speak, I thought it would be a good time to find out just what I bought.
Opening the control cavity I find very neat & tidy wiring, and a fully shielded & bonded control cavity lined with copper foil. Solder joints were neat & professionally done. Additionally, the cavity cover screws are not wood screws set in wood, rather they use small machine screws and threaded inserts installed in the body.
Pulling a pickup, I find that the pickups are fully potted in epoxy. The cavity where the Radium soapbar hum-bucker goes is hand signed by someone at the shop. There are people there that take pride in their work and it shows. My B4 that was built back in 2001 has similar level of detail in the cavity, so from my experience their standard level of quality is simply much higher than many of their peers.
Oh, and the little 30" vader sounds awesome with the DR Flats. I wasnt crazy about the D'Addario round wounds it came with. Now I get old school P-bass thump from the split coil neck pickup or a growling snarl depending on how you drive the tone. If you want clean tone, keep the volume knob rolled back about 1/3 and use your amp. If you have the volume on full its like a mild overdrive. The Bridge hum-bucker can add more modern tones and bite and the blend knob gives you an amazing amount of tonal range. Its a pretty impressive setup for a passive bass.
In a few weeks I'll try and put together a full review with some sound clips and will create a review thread for it.