Got this instrument in summer-autumn of 2018. Got better basses since then, but still keep coming to this one few times a week to practice (mostly unplugged) - it just feels great. Maybe good flatwounds add to the feel (stringed with around-half-the-bass-price Thomastik JF 346 - they don't feel loose and even kinda growl (open E, low-B) on this bass when unplugged).
- price: can you find cheaper fretless that doesn't fall apart in your hangs and requires almost zero maintenance (except truss-rod adjustments) for a couple of years?
- build quality: instrument feels solid, nothing's loose, everything can be set up just fine - quite low action, intonation, neck relief / truss-rod etc
- very comfortable and pleasant feel-wise: some people complain about neck dive - did not even notice that even when playing standing (maybe not all the pieces of wood are equal)
- narrow string spacing: matter of taste, but I really like that (and IMO it makes sense for fretless as it's mostly played fingerstyle)
- smooth fingerboard: no pores at all (have another fretless with panga panga and it's a really big deal)
- powerful fat lows: long notes or staccato ones - even uncompressed homemade direct input recording sounds nice and fat in the mix
Non-irritating cons / notes:
- tuners feel cheap, but do their job: some tuners "slide" a bit before string actually starts moving
- nut is not "slippery" enough even for flats: need to pull/stretch the string while tuning or it can go slightly flat after a couple of relatively aggressive plucks
- fingerboard feels quite "soft" and easy to scratch, I suggest stringing it with flats from the day one
- clarity/midrange: not enough clarity in lower register - you can hear some midrange-y overtones unplugged, but they're not picked up when plugged; fast riffing / galloping in lower registers sounds muddy and indistinguishable; haven't tried that with rounds though (but I think it wouldn't improve it much - IMO, pickups are to blame)
- pickups/electronics can clip the signal if you're digging into strings quite hard - IMO, worth replacing, the bass itself is well-built and resonates fine - just need to overcome the mental barrier to pour basically as much as this entire bass costs for normal (not the best) pickups
- built-in EQ is... Meh. Don't think you can make the bass sound better with it (even the opposite), so it's pretty much useless; better play with pickup balance instead