B-450FL BK Progressive Series : Surprising sound for a cheap bass

I was doubtful before buy this fretless because the low price. When I received the bass I forthwith noticed a very long and lovely sustain playing the strings without connect it to the amp, so I watched better the body and the neck and I thought that it's build very well for a so entry level gear. The strings though are not that good, give an idea about the bass power. Then I connect it on an Warwick Combo Sweet 15.2 and I tasted a surprising good sound from the pickups. After an hour of testing I changed the strings with D'Addario ECB81 flatwound that obviously give a more warm but a less brilliant sound, anyway the HB B-450FL returned an honest good sound. I think the B-450FL is a very deal for who want start to play a fretless and a battle or double for who just get a more professional fretless. I mean that the price/quality balance is WINNER!!!!