Complaint is more about unprompted 5.3GB download.
I think I'm at the point in the tech story of my home that I would love a UI that shows total and per-device usage history. With knobs to throttle each device on a temporary or permanent basis.
If it's a few years old, you may want to also verify that it can actually route fast enough for your incoming pipe.
Speed-wise,it’s also very good. It’s plugged in directly to my FiOS and I’m maxing out my 150/150.
You can use the TCP port (http vs bittorrent vs email, or individual games which often use a well-known port for communication), deep packet inspection (eg. to distinguish between normal web and HTTP video streaming), reverse IP lookups to detect location of the remote endpoint or what company it's assigned to (through AS number for example).
It took all of 10 minutes to get everything plugged in and configured and every WiFi issue I had in my house disappeared. I was immediately pissed at myself, why the heck did I resist the jump for so long?
Bonus points for the APs being POE, makes it a lot easier to put them on the ceiling, and more bonus points because I have not reset my router in 18 months.