Great sound - much better than my previous owned Sennheiser IE6. In fact when I listened the Ortofon I had to immediately compare with my Grado RS1i, connected to the Lehmann audio USB (amplifier and DAC). Before comparing it seemed that the quality of sound (connected to an iPod) was competitive with an high end system.
 
Only minus is that is difficult to adjust them to the ear. For me they are a bit too big.