I had one of these when I was in college, and I regret selling it and for as little as I did. Mine was a gorgeous tobacco sunburst model made just after the Ventures endorsement deal ended, so it lacked the Ventures marque on the headstock. It was essentially the same bass, though. Solid body, two very hot single-coil pick-ups and that narrow, ultra-thin neck. Keeping the neck straight was a challenge, which is one of the reasons I sold it (that and the fact that I didn't know what I was doing and didn't bother to seriously study bass for another 20 years.) Like all Mosrites, it had those extremely low frets. I always worried about using roundwounds, so I usually used half-wounds.
I still have a Ventures Mark V guitar, the 3/4 scale model seen on the sleeve of the first B-52s album. It has a pretty limited tonal range, but sounds incredibly cool for what it does. Unfortunately it's noisy as hell when surrounded by other gear.