I just bought one of these myself, had been using an ancient Netgear modem router for past 14 years, still going strong, but needed something new to make the switch from ADSL to VDSL.
I still haven't switched to VDSL yet, so using the new VR2600 with my existing ADSL connection. First thing I noticed is download speed increase from around 4mbps to 6mbps, probably due to the fact my previous modem was so old and I never upgraded its firmware so it wasn't taking advantage of latest standards.
New one seems to handle simultaneous multiple wireless devices much better, though the range is noticeable better using 2.4ghz than it is using 5ghz. Coverage is pretty good considering the modems currently situated in corner of the house by master socket behind a thick wall.
One thing I did notice is some packet errors (2 upstream 28 downstream over 24 hour period), should there never be any packet errors? or if so, whats considered an acceptable amount of errors per day? Connection seems pretty stable regardless. Should note that the modem is currently plugged into normal master socket hole via filter, which is not the true master socket, of course I'll get the proper VDSL faceplate with dedicated rj11 socket when switching to VDSL.
Just gotta wait now and see what its VDSL performance will be like when I hopefully get it next week, will update when that happens.