Mine is a digital version from about 2010 as best as I can tell.
It is an awesome electronic music drone instrument.
But it has two quirks:
1. The sample loop isn't seamless and every so often (on the order of minutes) there's a brief discontinuity in automatic mode. Running it through a delay effect mostly masks it, so that's what I do.
2. When running only on batteries (without wall power) it only works in automatic mode. The strings cannot be played manually.