Tell them I'm using pfsense ap2u on a FTTP 100/100 connection with Vlans and VPN had no problems at all.
I will ask him to respond when he can.
A am that friend
I'm using pfSense running on a pcengines AP2U system at my house in France. Its Orange Fibre to the Premises (FTTP) on a 100/100 connection. I use various media players and VPN in to the box often. Never had any issues.
The AP2U copes with all I have thrown at it and I get full 100/100 speeds connecting via a Google wifi AP connected to the LAN pot of the pfSense box.
Orange needs the DHCP6c (Yes I run IPv6) and DHCP requests for IP address to be issued over a VAN with a priority of 6. That requires a patched version of the firmware but if you need that capability I can share the patch
Shout if you need more info.
in short you wont go wrong with pfSense and and AP2U.
Plus both choppersrock and I have another friend who is a rather excellent pfSense coder and has tweaked pfSense a few times to make it work with ISP specific authentication requirements !!!