This router is installed behind a Freebox. After configured router with Wan logged Freebox side on a DMZ address, everything works fine. The advanced features of the router are numerous. It handles very well including debit priorities when QoS is enabled. On an average connection, it is possible to watch Netflix eg good quality while using properly yet little remains of bandwidth.
I was able to keep sharing files on Freebox by properly configuring the security software on my different PCs. Hacking in the router would also be more simple, but I have not found.
In all cases, this router is stable. No crashes experienced.
Recommended for those who know or are not afraid to tweak!