I am using this cord gaurd in our garage for an extension cord and an air hose that need to go from one side of the garage to the other. They work great! They are heavy duty (and heavy), they don't slip around on the concrete floor, they are easy to load (just open the top flap). I wish there was a way to "lock" or latch the top flap down after it has been loaded. It stays shut on its own, but curious children lift it more easily than I'd like. There are non slip bumps on the top which I appreciate. The high visibility yellow is nice for an area where they will be walked over, but makes them not ideal for on stage applications where solid black would be preferable. They have held up to being driven over by our cars and walked over. The 2 side by side channels are a nice way to keep things separate. They do bump up a little high, but I haven't tripped over them and I did trip over the cord and hose regularly so I suppose they work. They come in a set of 3 that can be used seperarltelyor slotted together in a straight line end to end.