I replaced an older SFF with an Atom processor, 4GB of RAM and a HDD with this unit after upgrading my Internet connection from cable to 1 Gbps fibre.  I was hitting a CPU and NIC choke-point, and only getting ~400Mbps at any point on my network.Install was super easy, booting to a USB key with the ISO image loaded was seamless and presented no issues.  Untangle recognized all 4 NICs and numbered them correctly (eth0-eth3) with WAN and LAN as eth0 and eth1, as expected.Using the Intel i210 NICs is huge for Untangle performance, which is why I bought this specific model.  My previous firewall was using RealTek NICs based on the 8168 chipset, and while I generally didn't have problems with streaming and overall performance, the NICs were a definite bottleneck during the day when I'm also constantly VPN'd in to work and I'm certain after research were capping my max throughput.After I got everything configured, my CPU and RAM usage are both way lower (CPU went from 4% avg to < 1%, RAM from 65% to 23% utilized), and more importantly my throughput has jumped to ~825Mbps in some parts of the wired network, and ~700Mbps on wireless.  Huge improvement and I'm able to realize the value of my improved ISP connection.Nice little overall system.