Summary: I ended up ordering the 4 port model without audio and it works as intended. I have 2 of the other KVM's that work flawlessly. I wanted a KVM with longer cables and audio, but you can't always get what you want. My other KVM's are IOGEAR.
Pros: Nice looking and long cables. Has audio feature I wanted.
Cons: This KVM would not recognize different mouse and keyboards. Switching was a total disaster as it would only recognize what it wanted to. I RMA'd asap..
Working fine after some initial errors. Not uniform with their 2-port KVMs in operation.
5 March 2015
Summary: I already have 3 IOGEAR KVM switches for other locations, but they're 2-port. I was hoping this 4-port would work the same way because my employees are already accustomed to hitting [scroll lock] [scroll lock] to switch computers. This one requires you to hit [enter] after the scroll lock keys.
Summary: The only annoying thing is this doesn't work in BIOS screens of older hardware that do not recognize USB during BIOS setup, but really that's a limitation of old hardware, not the fault of this awesome device at all.
Pros: Used it daily since 2007 and still working well. Have used regularly with Windows/Linux/FreeBSD hosts with 0 issues.
Cons: Cables not thick enough, my naughty Rabbit ate through one of the embedded KVM USB cables and now I can't use that port! LoLs.
Pros: I bought this mainly for the design, because it looks similar to a Mac Mini. Works very well and has all the ports needed.
Cons: Destroyed my logitech adapter. I cannot pull that sucker out of the usb keyboard slot on the hub. It is lodged in there and the plastic cover broke off trying to get it to release. I use this with parted magic that loads from usb and my wireless mouse randomly gets slow and will have to click mul...
Summary: I just bought this KVM and received it yesterday. It is replacing an Avocent KVM that I had from work that I had to give back. The keyboard switching is very convenient, but a manual switch would be nice to have (for those times when someone who doesn't know the keyboard controls might need to use...
Summary: This KVM works most of the time. But periodically it comes up with the wrong screen resolution on one machine, and there's NOTHING I can do to correct it. Iogear has no tech support to contact, and their FAQ has no answer. Google has revealed no solution. HOURS are wasted.
Pros: Has usb and audio connections for 4 computers. Hot key strokes to change systems.
Cons: No monitor information is relayed or passed to the computer. So with auto detect in windows 7 you have to use a generic monitor and enter the correct resolution. The audio introduces noise that is heard depending on the what is being displayed.
Summary: Nice 4-port KVM although a little larger than expected. I also hav a smal 2-port KVM from Iogear that is a mini compared to this and I was hoping that this new 4-port would have been smaller so not to take up so much valuable workspace.