Very good although the sound check should not require any account creation just to use this features and custom EQ should be available offline. Another thing that is bothering me is that you can only change the settings when the CX Plus SE is connected, it could be better if the user are allow to change the settings even before the CX Plus SE is connected.
The earbuds were great. The fit was good and the noise cancelling works really well. Music was very clear. Loving it!