I had absolutely no problems with this device. It's powering 7 cameras right now and has bright LEDs to show me network activity. It was actually great in saving me time to set up every camera, instead of plugging each camera in to my PC one by one, I just added a camera to the switch as soon I set the previous one. I could see each camera on it even when the cameras were temporarily on a different subnets.
Though I have only been testing it for a few hours, I'm happy with it and feel confident it'll work for years. It is worth the extra cost over a non-POE switch in that it saves much time by not having to run separate power lines.