It has a good value for the money, however, the left hand versions are fitted with a right hand saddle, so intonation is way off (you can also see that in the pictures in the site). Also this saddle is integrated with the piezo element, so it's not really replaceable without losing the preamp function.
It does have a truss rod, so that's nice.
The rubbery Aquila strings sound nice but are very sticky, so you can't really slide over the strings. I tried to fit it with steel Bass Uke Strings, but because of the higher tension and different gauges you have to fit the bass with a new nut and saddle to get good contact and a playable action. The nut is no problem, but the saddle is. The truss rod works fine, bur for the action and intonation you really have to refit the saddle.
Acoustically it sounds ok with the Aquila strings, somewhat quiet. These sticky, rubbery strings do limit your playing (if you used to a regular bass guitar like me). Amplified it sounds quite good.
Steel stings don't sound good acoustically without a good setup, and as I explained, that is difficult because of the right hand piezo saddle.
Update: When changing the strings to Ubass flatwounds, the tuning machine of the E string broke. I took it apart, and apparently the Headstock is too thick for the shafts of these tuners, so they are likely to go loose at some point. Removing the thick black washer on the front of the tuning machine dit some the problem.
I also refit the bass with a new saddle that fits in the piezo, and a new nut, and now the action and intonation is fine. The fretwork is not great, because they are not level, but I'll fix that in the future. Besides that it's fine now.
All in all it could be a great product, but all these flaws make it not so great.
