Summary: If you need OSD (on screen display) functionality, get the TK-804R instead. If you need low cost reliable VGA KVM switching, this is the unit to get.
Pros: Short depth 1RU chassis w/included rack ears. Fast and very responsive switching, even when using keyboard hot keys. Recognizes systems that do not have USB connected (VGA output of CCTV DVR.) Instant recognition of connected system (as compared to other units which recognize video about 3/4 though POST, making BIOS changes difficult.)
Cons: crinkly sounding plastic protection on unit from the factory.
Summary: Trendnet support is actually quite good. They offered to do an advance replacement for me, free of charge. They said I should have the new unit in 8 to 10 business days. Not too shabby considering it's only a $100 KVM.
Pros: When it worked, the KVM setup was easy, switching worked nice and it had a quick monitor response.
Cons: After a month, the KVM would "lose" machines. Sometimes, they would show display only and the mouse and keyboard wouldn't work. Other times, they would come back fully functional. Other times, I would have keyboard and no mouse. As of today, when I press the space bar on my keyboard (and I've tried a few), sometimes the KVM will relay a space and other times it will function more like the ALT+TAB key sequence. Tried in Linux and Windows and both give me similar issues.
Pros: Easy to hook up and switched between ports fairly quick. The status light are well laid out and let you know what port is active and when a server is down. This was used in a surveillance application so there were no real intense graphic demands but the display was acceptable for this application.
Cons: After 5 months one of the ports died. This unit is maybe switched 30 times a month from server to server so there is little use. After 8 months another port died. I am going to replace it with another brand as I expected this to last about 5 years given the amount of use.
Summary: KVM works excellent, only drawback is that the usb only works for the keyboard and mouse unlike the trendnet 4 ports i am used to using. The trendnet can switch your printer and speakers each time you switch computers but this one i have to switch the usb back and forth and each computer needs its own speackers but it does work well with laptops and desktops. If you only need 4 port trendnet is the best but if you need 8 you probablt wont find beter for the price.
Summary: The best KVM I've ever used. So reliable, I don't even have to think about it.
Pros: Very nice solid metal KVM. The rack mounts are solid and everything about this feels sturdy. Easy plug cables (sold separately!) make for simple swaps in and out of machines. Every Win2k, 2k3, XP, Vista, Windows7 machine I've thrown at this are recognized instantly and work without problem.