I like those! Especially the second one. My cats do better with an open litter box. I have to keep everything easy in my house, because I have four cats, and I REALLY like for people to not know that I have four cats....or any cats, when they walk into my house. So I have four litter boxes. I have found that a large, rubbermaid (or one like it but not necessarily the name brand) works best. It's large, it's open, they have no problem hopping in it and turning around. I scoop once a day, at the end of the day (you would not even believe the mountain of mostly urine clumps I get at the end of the day) and once a week I wipe down the sides of the litter boxes, with paper towels and a mixture of water and vinegar. Two of my cats lift their butts a little too high, so they do get the sides of the box fairly regularly, but they all (knock on wood) go in the box, so I'll take the peeing on the sides on occasion. But I do keep it wiped down. I shove all the litter to one side and clean, and then do the same for all the sides. If I do this, I find that I only need to take the boxes out and hose them about once a month. I keep adding litter to keep it fairly full, which is the key to keeping it stick to the bottom.
I do like what you have done, seems like a pretty good system. I only spend about $5-7 on the rubbermaid containers, but I spend a small fortune on litter. I find the scoop away scoops really well, and it forms into really tight clumps that are easier to scoop (unless it is wet and then it is a nightmare.....never even try to scoop it if it's still wet just let it dry). Scoop away has a TON of dust though, but it does settle.
I do have one older cat, and I have a litter box that has high sides but is open in the front, easier for her to walk in and out of, and she mostly uses that one, but my others prefer the big rubbermaid boxes.