Packetfront/Waystream gear

Does anyone have experience running Packetfront hardware in a production network? We've looked at a few and they seem to be pretty good but I want to know if they have downsides. We're looking at them for edge switches now and thinking about if they can be site routers or switches (either a q-in-q vlan handoff to a ring or a separate L3 with routing protocols depending on how the site is accessed) You can contact me offlist if you don't want to talk about it publicly. Thanks, Robert