My acoustic 4 string has a raised 17th fret, easy to sort but I've no business being up that end so left it.
The pickup is strange on that one as well, the E and G are a lot quieter than the A and D when plugged in, whether that's the problem or just how they all are I don't know. Strange as it's the higher quality one with the Fishman electrics, it's fine acoustically though.
Can't complain for £40
I cannot find anything wrong with my fretless acoustic apart from a tiny mark top of the headstock.