Paul Warren has one & likes it. (I played it briefly when I visited him out west & it felt really good.......didn't plug it in though)

Japanese ones are VERY good. Korean ones are just good. The sound is Bartolini'ish and Tobias'ish. Not my cup of tea.

As Brian mentioned, I have a Japanese Tunebass Maniac 4 string. You can see it on my home page and read a few comments.

It is VERY good. It has many useful features. My favorite is the trim pots on the pre-amp. They allow you to change the tonal range. It makes the bass really customizable.