I was looking for an acoustic fretless bass, with that classic double-bass-like sound, at an affordable price (it's not easy to find acoustic fretless basses, especially this cheap, let alone with 5 strings). This instrument is exactly what I wanted and even better, and so fun to play! It is my first fretless, as well as my first 5 string. I'll list the pros and cons below (though it was difficult to find any cons, this instrument is perfect!)
PROS:
-Classic double bass like sound, great lows and highs, and that "maaww" sound when you slide
-Very well built, is lightweight but feels solid
-Beautiful glossy black finish, certainly a looker!
-Smooth feel, easy to slide
CONS:
-The low B string is a bit muddy compared with the others, it's not a huge problem though and can be fixed with EQ (or possibly a string change)
All in all a great fretless bass, really love this instrument and can't stop playing it! Would highly recommend this to anyone who'd like to buy a fretless!
EDIT: I have changed the strings to flatwound D'Addario Chromes. Great sound, no squeaks, the only issue is that the low B string does not fit properly, even after removing the silk from the ball end of the string (the original was .130 and the Chrome is .132, so not a huge difference), and now the Chrome is stuck there, so I cannot remove it either. I'd suggest widening the low B hole with a small file before switching to a larger string gauge.
EDIT 2: I have gone back to the stock strings, the nickel roundwounds. These strings sound more lively than the flats I was using, even if they will wear down the fretboard over time. If you do decide to keep the roundwounds, give them some time to break in. The low B is also sounding a lot better than when I first bought the bass, so actually the stock strings are great once you wear them out a bit!