I own one. Definitely shouldn't buy before spending some time with this instrument.
When I've purchased mine (about 5 years ago) I had not tried it before and when it was delivered I was really upset with the fact that I can't pay it, though I've tried different fretless basses before and had no problems. It has a really massive neck and body and I wouldn't call it a Fretless Bass Guitar BUT rather Mini-Doublebass. So, besides my bass exercises I've spent bulk of hours learning to play it from scratch. However, as long as you play Doubleness - you will escape this problem
Secondly: Feedback/noise, which you can avoid by being careful with volume and positioning re speakers.
Third: it is TOO HARD to carry in its beautiful original hard case. But you can find an extra-large carry bag, or avoid this problem at all if you drive.
Other than the above points, It is REALLY AMAZING instrument both in terms of sound and look. I have not sold mine and I never will. AND don't listen to [color=#282828][font=helvetica, arial, sans-serif]'acoustic basses are pointless' saying guys - They are just jealous
*can't figure out how to add photos here...[/font][/color]