Instruct: Classify Amazon reviews into positive or negative sentiment
Query: device redetection issues are serious drawbacks

The TRENDnet 4-Port USB KVM with Audio is an unacceptable solution for many automated testing conditions.When switching from system to system, USB device redetection commonly occurs, which can cause problems with certain automated testing scripts. Additionally and more seriously, the video resolution on some Windows 7 systems will change if the system is not the active client on the KVM, particularly if a reboot occurs while the client is not selected on the KVM.On the positive side, video signal quality is good at 1920x1080 @ 60Hz. Keyboard and mouse functionality has never dropped on an active client, which occurs often with certain IOGear KVMs. Audio support is solid.For very basic uses, the TRENDnet KVM's flaws are annoying but generally acceptable considering its relatively low price. However, IOGear products only slightly more expensive do not suffer from the same drawbacks.