I've had one for 2.5 years. I preferred the rubber strings for recording (way more of that double bass tone) but you have to be careful with pitch, if you dig in too hard note pitch goes up easily (moreso on lower strings), not so much with wound strings (but that's about the only advantage, they're quiet and don't sound as good and "acoustic", of course). If an ABG can't seriously be played acoustically with just a guitar, well, imagine the U-bass. Which leads us to my final realization, if I have to use an amp I much prefer a hollow/semi-hollow electric bass (either fretted or fretless) EVERY TIME to any U-bass or ABG. So no more acoustic basses for me, the only serious/usable thing if you want unamplified bass is an upright. No more throwing money away on things only suitable for sofa play (a u-bass excells at this, until someone with the wakest of ukeleles sits beside and renders you virtually silent). Exactly as with the ABGs I've had it was awaste of money I won't repeat. Still some people love u-basses and do great stuff with them, to each their own.