I have couple of 560,570,530 units
depend the size of your network and internet connections
System Uptime
Uptime 60 days, 14 hours, 7 minutes, 46 seconds.
the 560 unit have by default 1 wan and 4 lan but each lan port can configured as a lan/wan or dmz
a short review
+green(power)
+boot in ~15sec
+very stable for <70mb/s internet connections
+easy to manage/configure
+minimal hardware (Processor : XScale-IXP42x 16mb ram)
-unstable ipsec/pptp after a while
-load balancing is strange
-end of life support 07.2013(latest release 03.2011)