I bought a H-B six-string a while ago as I wanted to try to play on a six-string (without committing fully to a more expensive instrument yet). Overall, I am very pleased with what you get considering the price tag - it is really unbelievable how they can manage that. AND, it was set up very well by the Thomann crew.
That said, you can see it is a “cheaper” instrument as soon as you look more closely - some finishing details are just not as good, the pots are starting to be noisy very quickly, the tuners are not very smooth etc. But, you have to expect that, really. The bass sounds awesome though, and plays great!
The 6-string is HEAVY… I wouldn’t want to play that for two hours on a stage. However, for noodling on it and getting a feel for the six strings and doing that while sitting… no problem.
I had thought about buying a cheap J from H-B and make that my “project bass”, i.e, start replacing bits and pieces with better stuff; both, to genuinely upgrade it, but also to learn more about what matters with these pieces of hardware and how to mod a bass. I haven’t done it yet… turns out, many of the pieces of hardware I’d like to try cost as much as the bass