I have 3 multi-sites up, no real issues at all. We did have issues with the first part of a new mult-site deployment using firmware 3.0, we were getting DSP issues, fixed it right away with 3.01, that did resolve some field complaints. Off to add 4 more nodes to the system next week, buzz around OK, and WY on a puddle jumper to hit theese places. All on a MPLS network, which takes a big headache away. Plus setup to use ToS, DHCP auto load CONFIG. Found it takes planning, and a good strong setup before deployment