The UK’s Bass Guitar Magazine has a nice two-page review of the Kala uBass in their July 2010 issue. They also have a bunch of nice photos with the article. They give the uBass four out of five stars.
You can still access the review on their website here.
According to the review:
Plus: Super portable, interesting and unique tone
Minus: Strings take some adjusting to, accessing the back panel can be fiddly
Overall: A great addition to any bass players arsenal, it’s a travel bass, an upright bass alternative, and above all, an interesting instrument in its own right.
They called it the “ultimate travel bass” and concluded that every bass player should own one.