Based on my past experience with IE40 Pro, this new IEM is definitely a great upgrade. The hard travel case is well sized with the cables coiled up it closes without pushing onto the drivers. Drivers are very small and fit into my ears without protrusion. In terms of sound, the highlights got to be the wide sound staging, non-fatigue mid-range & treble and strong bass response. I feel that improvements can be made in terms of the cabling as microphonics are an issue and cable sheath is too grippy. No issue with cable length as it is sufficient for me with the DAP in my bag.