I've played a Guild Ashbory for about five years. IMHO, it does not sound like an upright, unless you're comparing it to an upright with a piezo played through a bad amp. Don't get me wrong, I love my Ashbory, but an upright has an acoustic sound that you can't match with an 18" scale solid body. It is capable of getting closer to an upright sound than a fretted electric bass with round wounds, however. Vibrato on the Ashbory is accomplished by rolling your fingers like you would on an upright, as opposed to bending the strings as you would on a fretted instrument (it is impossible to bend the strings on an Ashbory), so in that sense you can approach an upright sound. If you're looking to sound like an upright, you're better off getting a full scale fretless with tape wound strings. Because the Ashbory has an 18 inch scale length it is very difficult to play above the 12th position, so for a lot of music, it just doesn't work very well. I use mine for acoustic music, country, and bluegrass. It works very well for that and it doesn't look that out of place. For rock bands, I turn to my peaveys...