I'm considering buying a UBass at some point, but I'm worried about the intonation issues and volume string-to-string. Is there good reason to hesitate?
The newer ones with the slanted bridge saddle seem to have decent intonation, but consider a fretless and it's no issue whatsoever.
There have been a few reports of string-to-string volume issues that were due to pickup problems, which Kala has addressed. I got one of the newer ones with the built-in preamp, and have had no such issues.
If you're concerned, my advice is to try before you buy, or buy from a dealer with a good return policy/reputation (i.e. Sweetwater).