I've had both an acoustic bass guitar (an Adam Black, now sold) and a Ubass (fretless Kala, now sold) (and I still have an Ashbory, with an O).
I got rid of the acoustic because I couldn't get used to the bulky body and because it was too quiet not to use with an amp - so it was relatively hard to carry around, hard to play, and I still had to bring an amp as well.
The Ubass was much better, for me. I sold that because I wasn't in a band which needed it. The intonation was a little tricky but not impossible, and the noise was fab