Stunning basses.
I've had a TM5 and I'm selling a TT4 passive as I'm only playing 5 strings now.
The Sandberg neck is far nicer to me - it's slim like a jazz but the fretboard radius is 14 inches, much flatter than a Fender. The neck only has a satin oil finish and is really fast. My TT4 has a far lower action than any Fender I've ever played
Also recent build models come with Sandberg's own lightweight tuners so there isn't any neck dive.
The TT4 passive sounds like a good jazz should, but with modern touches like the flatter board, 22 frets etc.
The active ones have a sensible 2 band EQ that doesn't get silly.
I suppose the only issue is that if you want something specific, like an ebony board, or block markers, matched headstock etc - those are optional extras, so you either have to make a specific order and wait about 8 months (or 18 months if you want a heavy relic) or hope you find a dealer with the exact spec you really want.
Although I'm offloading my 4 string basses, if I ever wanted another P or J type I'd buy another Sandberg. Fender wouldn't get my money.