Very good screen
First of all, thank you to LDLC for the speed and quality of the delivery, given this type of equipment and its potential fragility.
The monitor, which is used as a dual screen on an iMac 27, is really very good and of good quality.
One small downside (although I'm not taking away any stars) is that it's a shame you can't adjust the height so that it's the same height as the iMac. A small wedge to raise it will do the trick.
Important note for owners of older Macs (iMac or MacbookPro): use a Min DisplayPort to DisplayPort cable rather than a Mini DisplayPort to HDMI cable, as the resolution of the latter is very limited (1600 x 900). After replacing the cable with a Min DisplayPort to DisplayPort, the maximum resolution becomes available (2560 x 1440).
What a pleasure!