199 € at Boulanger. Purchased on the 21st, there is an immediate discount for the addition without the basket.
I received them on 22, these headphones are a killer! I had the MX3s, but the MX4s hold a lot more naturally and the touch controls are more responsive. Pure happiness. The case is smaller and seems to me more fragile plastic than the case of the MX3.
The noise reduction is better, the sound recording is much more audible for the called party, the bass is a little more present. Not had time to test the autonomy on the other hand.