I did use it on a few occasions to scrape ice and packed snow off the driveway. It worked well for that, if I stood on the blade to exert enough down pressure to cut through it. Come summer I found my driveway all scraped to hell with large chips in the concrete where the blade struck the joints. It did get the ice off but with a cost I wasn't happy about. I ended up giving the blade to my brother, never to be seen again.
Next encounter was after a move to Naples Florida. I was selling a mower deck to a fellow who asked if I want what he thought was a John Deere attachment but had no idea what tractor it was built for. It didn't work on his. It turned out to be a 54c with some modifications. I did take it off his hands for a small discount on the mower deck. He didn't ask for the discount he just wanted to get rid of it. I did have to do the normal mods to cut a relief to clear the hydro lines under my 317. I was at the time installing a very long driveway to the back of my property. Total about 600 feet. Florida swamp soil is pure sand and requires what they call lime rock to make a road that is usable. Here again, I though I would final grade the fresh lime rock that the contractor put down. Well, I did but to be honest the operator of the Bobcat was so good at spreading and leveling that I really did more harm than good. As for using it in the sandy Florida soil, forget it! It just dug in. It worked well back dragging weeds out though.
Next I decided to place 87 pea rock over the drive do make it look a bit better. Again, the same Bobcat operator spoiled my day buy placing the stuff so well it didn't require and additional dressing. But a few years later, I thought the drive needed a little attention so I dug the 54c out of the brush that had grown around it, hung it on the tractor and used it to scrap the pee rock off the hard lime rock base which it did well. The base was so hard the 54c just jumped around under the tractor and hardly scrapped off enough material to level the low spots. After doing as much as I could I tried to level the pee rock by back dragging it with the blade. After a few hours of playing, I took the shovel and rack and finished the job. I then sold the 54c!
So, I like to play with this stuff as much as anybody. But the moral here is use the right tool for the job. And in my opinion, these blades have no practical purpose that would ever justify the cost and wear and tear on you tractor. They are a toy and perhaps somebody will chime in here to tell us how well his works in some ideal situation.
One last thing. I did have a 318 at one point in time and I too slid the blade under it. It could be made to work with modifications that I didn't think were worth it or good for the tractor. I've seen numerous 318's with bent and damaged rear frames. Their just not a stout as the older tractors with the closed frame. I would not only never advise anyone to spend any money on these blades but also for sure not to mount them on an open frame tractor. If your just bladeing fluffy snow or feathers maybe so. But who would want to drag that thing out and hook it up just for that? Perhaps just once.
Sorry to sound so negative but if you looking for justification for these things, or most anything else, your likely to find plenty of it on these sites. Just trying to save folks from wasting time and money hoping the thing will accomplish something useful.