I have had this product for nearly 45 days and I am pleased to report that it works as advertised, though I did have two tiny issues.This device supports Mac mini (powerPC Tiger 10.4), Dell E521 (XP pro), IBM Thinkpad T42 in docking station (XP pro)and a older Dell Dimension 4100 (W2Kpro/Suse9 dual boot). I use this device primarily for KVM switching and do not currently use the additional speaker/mic/USB options. The KVM switching works and has without issue (after initial setup) since first week.Here are the two issues...I have to plug the USB cable (for Kbd/Mous) into the side USB port of the T42p Thinkpad. It will not work using the USB ports (there are 4 of them) on the docking station. This could be due to some issue with the docking station. The VGA **IS** plugged into the docking station and works. Its a minor nuisance to plug/unplug the USB cable from the switch into the side port of the laptop each time I dock and undock, but I can live with it if the KVM works otherwise. And it does. On the plus side, The expanded two-screen feature of the laptop works with the KVM so when the laptop is switched in, both the laptop's screen and the standalone LCD work (as one big screen). This is nice as I can start a long running process on the laptop and drag its window to the laptop's screen and then switch the KVM to another system. While the main LCD is attached to the other PC, the running window on the laptop is still visible.The other minor issue was that the switch never did seem to get along with Logitech cordless keyb/mous. Behavior was erratic. Sometimes with it would switch between systems and work perfectly, other times, after a switch, the mouse and/or keyboard would appear dead. I've seen other similar complaints on several KVMs so I don't think its a deficiency of the KVM switch as much as it may be an incompatibility. If wireless k/m is a necessity (yeah, I don't like messy wires either) then look for a KVM with its own wireless k/m (they do exist). After about 2-3 days, I switched to the hardwired keyb/mous that came with the Dell E521 and there have been no problems since.As mentioned, I do not use the mic/speaker switching option.I did initially play around with the USB switching feature, running a USB cable from the KVM to a 4 port USB hub to which are plugged cables for various items. The only live item is an external WD disk. It worked, but I found it aggravating each time I switched since the PC you are leaving beeps when the USB device is unplugged and the PC you are switching to beeps as the USB device is discovered. (I switch frequently). BUT, the PCs **DO** recognize the device as it comes and goes, which indicates that switching works.I've had **NO** issues on any system with sluggishness, erratic mouse tracking, etc. No negative impact on gaming.Also, the quality on the LCD (19" Xerox) appears to be no different (to me) than when the LCD is plugged directly into the PC - which is to say, I don't see that the KVM has introduced any degradation into the video signal. Clear, sharp, no waviness.The last nit is I really wished they would have put the two USB ports for the keyb/mous in the back of the unit instead of the front. Having them in the front, they poke out and then the wires run back to their concealed area. Had these two plugs been placed in the back, it would have made the overall appearance much cleaner on the desk as the switch fits neatly in the gap under the main LCD screen and its base stand.All in all, I found the product worth the money and I am pleased with it's performance.- - -30-JAN-2011This switch has worked great over the last three years. Only one addition. Recently the Dell USB mouse I had been using with this switch began to fail and I opted to replace it with a bare bones Logitech M100 mouse. It was NOT a straight forward process because this newer mouse is an HID compliant device. Do NOT plug it into the mouse usb port on the front of the switch. Just plug it into either of the two usb ports on the BACKSIDE of the switch. I can't say for sure why, but apparently an HID optical mouse it not exactly the same as the old fashioned usb mouse. FWIW, I tried the usual powering down of the device, a USB reset, etc, and with the house plugged into the front "mouse" labeled port, the mouse behavior was extremely erratic. I've never used the back two USB devices (for printers/drives) but gave it a shot and the HID optical mouse started working smoothly.