This is our third set of sheets we've purchased. First the Chateau 800 Thread Count sheets. They were thick and very solid and when washed up got nice a wrinkly as pure cotton should. By the way, the way they make sheets wrinkle resistant is with a chemical. If that's what you want, please, do not complain about these sheets. They do not deserve to be downgraded because YOU want chemicals in your Long Staple cotton sheets!!!We returned the Chateau because they not only shrank considerably (we couldn't get the corners down to the bottom of our 16" mattress) but their topsheet is WAY too narrow (King). They are a good 6-8" too narrow. Still, the Chateau were very nice sheets. Thick, durable, soft after a handful of washings...very well made. Even had an elastic reinforcement half way down the pockets. Nobody else has that.The Royal 1000 Thread Count sheet set is a very high quality 100% long staple cotton with NO chemical treatment for wrinkle resistance. The bottom elastic on the fitted sheets (Split King - 2 Twin XL fitted sheets) is quite robust, thick and very elastic. The pockets will not fit anything taller than 16". After one washing they barely fit, and I mean barely. But, once you can stretch it to the bottom of the mattress the elastic takes it from there and keeps the fitted sheet in place. So, high marks for how the bottom is constructed. We bought the Gray and it is a mid-gray color and it seems just a bit "warm", very nice.As for the fabric, of the three (Pizuna, Chateau and Royal) they probably have the highest quality fabric. Not as thick as either of the others but VERY tightly knit. 1000 thread count really means higher quality when it comes to Sateen sheets. I'm not sure why, but they say it's single ply, maybe that's why. Among the three, the Royal 1000 was the least "furry" with a short nap and a very smooth texture. After just one washing they are quite soft and supple. Will they be as durable as the other two? Too early to tell. It's very tight weave may well allow a decade of extremely comfortable service. We have one other set, which are very high quality, we bought about 12 years ago and they are quite similar. All of the stitching is just excellent. The top fold over seam is the nicest of all of them. Are they worth the 20% more than the others? I'm not sure. The Pizuna are incredible set of sheets (though their color options for a Split King are limited to just white). The Pizuna probably represent the best value at 20% less. They are thick and will likely outlast all. They would take a good 10 washings before they would be comfortable. The Royal 1000 I still consider the finest quality of the group and, likely, on all of Amazon. Though they are not quite as thick the exceedingly tight weave mean they will have a long comfortable life. They are supple and soft after just one washing and sleep the most comfortably of all. These are beautiful sheets. Worth the money? I think so. We're glad we purchased them.