My office maintains 2 WAN connections a cable modem and a DSL line. The router is supposed to sample the load on each and route traffic to the least used connection. It's also suppose to detect when a connection goes down and automatically route traffic to the remaining connection(s).
The Xincom never correctly detected when a connection went down (when a connection fails, it returns a "fake" internal IP address which the Xincom mistook for being a valid connection).
The Peplink over came every one of these problems out of the box. As soon as I plugged it in and configured it with my network, both VoIP phones worked perfectly as well as my existing applications. It fully supports port forwarding, firewall protection, VPN access while at the same time performing load balancing and fault detection/redirection.
Coincidentally, on the third day of having the Peplink installed, my cable connection went down. It took me a couple of hours to realize this because Peplink had detected the failure and redirected all traffic through the DSL line.
This is a great product for someone wanting higher performance by using multiple WAN connections.