There was a good thread here - the offer (same drone for €459.99) has expired but there is a good lot of information in there about users experiences with this drone.
Just check there is a DJI warranty - for a time they wouldn't as this model was supposed to be sold in China market only - don't know if its changed.
However you if you can stretch to a Mavic Air or Pro - Id recommend those drones over this (also recommend *not* getting the Spark - doesn't fly very well in Europe CE)
Thanks for that. The Xiaomi 4k drone looks like worthy competition