Our current one is a Rough Deck, it and it's readout were purchased through Rice Lake Weighing systems. It is a nice big flat, low profile tread plate deck, set up behind the chute. Cords are heavy duty and out of the way. It is certified and the deck it flat, as wide as the ally/chute, and a solid 6 feet long. The cattle have plenty of room on it, and barely have to stop to get an accurate weight.
Have had a trough style one that sat in the same spot. Bottom of trough was too narrow for anything but a calf to stand in properly. They would step on the sides and tip it under themselves. Also, the cords were too light duty, and due to that and placement, were constantly pulling out from connections to the scale. Would never recommend this style to anyone that has cattle.
Have also had the bars mounted under the Priefert chute. Also a major problem. The forward force of cattle into the chute repeatedly sheared off the mounts. A pain to fix anyway, but having to move the cute first made it extra special. As other noted, it also makes it quite a step up in to the chute also. Most of our stock are FS 7 anyway, so making things taller is not wise. Now we have a bigger chute also, so the under chute system will just not work. I like the scale behind the chute anyway. You can have one animal in the chute getting vaccinated or whatever, and another on the scale, getting a weight and ready to go in the chute. :2cents: