A friend of mine has a SB-104, and it actually is a great rig to use. Very convenient
for Field Day, where it is easy for most hams to sit down and figure out the controls.
But it isn't exactly stock inside. The circuit blocks have been redesigned for 50 ohm
interconnections using small coax. I have no idea whether the PA has been replaced,
but given how it gets used on Field Day it certainly is rugged.
So if you like the styling, it isn't impossible to make one work well.