I didn't know any better about how to listen for flaws or get a feel for ergonomics, so I ended up buying the“traveller guitar bass for $200. I kinda regret it.
I love how it just sounds different and thumpy, but the piezo pickup it has - it's sounds so bad on my headphone amp. I can hear my fingers sliding over every millimeter of string, but it isn't outrageously bad on a regular amp. On a regular amp, I couldn't tell you why, but I like the sound of my Ibanez mikro bass so much better.
Also, the ergonomics. I cannot for the life of me figure out how to rest the travel bass on a leg sitting down, even with the detachable bar to extend the side of the guitar for lap resting. It's hard for me to find a comfortable position sitting/atanding
I couldn't hear the tuning either to judge quality. I found that when you pull backwards on the neck, it bring the string enough out of tune to tell, even by my hearing skills