ESSB can sound good if it's done right. To take advantage of it, the receiver's local oscillator (BFO) must be adjusted precisely to the the transmitting station's (suppressed) carrier, with zero frequency error, which isn't always easy to do. Where the ESSB guys missed the boat was by not transmitting a pilot carrier, reduced maybe 15 dB but not completely suppressed, and using a PLL-controlled local oscillator at the receiver to lock into the pilot carrier. That's what AT&T used to do with their long-distance HF radiotelephone circuits. Something I find amusing is ESSB signals with so much bass boost that the voice frequencies at the lower register dominate, and act like a BFO to demodulate the rest of the signal, so you can understand what the voice is saying listening with the receiver in AM (envelope detector) mode.