I have to say that the craftmanship & quality of this bass is very good. The neck is smooth, & the fret work is nice. The wood grain on the neck is also nice & I wonder if it is quarter sawn. The blue burst color is very nice, it will be perfect if the paint finish can be a bit thicker with gloss finish. The bass is also not heavy, even it is a 5-strings bass, just around 4 kg but no neck dive, so will not be too much burden on my back & shoulder. The sound can be highly versatile sound as of J-MM active / passive with split coil feature, & the tone is very good. The only thing I would comment is that the pre-amp (from Glockenklang I think) which is not of my taste. The treble frequency is quite high, & is a bit harsh for me when it got boosted. Nothing wrong with the pre-amp as it works fine, just my personal taste. In conclusion, it is a very nice bass. I want to have a TT4 if I can have more budget for instrument.