I read many reviews on different brands of PoE injectors, and I decided to go with this one. This is a great little device that does the job that it was designed to do. I brought 3 of these injectors to power my PoE surveillance cameras around the house. Although this supports gigabit, my cameras and switch are only 10/100, so I can't comment on the speed of that. However, the data transfer rate seems to be pretty consistent. I have had these injectors for a two months now, and I haven't experience any data signal drop or power failure. And of course, they are ON for 24/7; they have been reliable. Depending on the location you put the injector, the unit doesn't feel hot to touch, only warm at most, which is normal. There is really not much more I can say about this injector. If you are looking for a PoE injector to power your surveillance camera, look no further, I would definitely recommend this one.My only complaint is that, the ethernet cable that comes with the injector is only 3 feet long, and it is too short for any of my camera setup location. But then again, for the price, it was still a very good buy. I brought some longer cables on Amazon, no big deal.