These are pretty comfortable sheets overall - better quality than some other sheets I’ve tried. However, there was fraying after the first wash. They fit large on my thick king size mattress - so it’s a matter of preference if you like your sheets tight to the mattress but harder to get on or easy to get on but not smooth. I would prefer smooth fitting sheets. I received the color French grey which is much more of a baby blue than I would’ve wanted. I prefer super cool feeling sheets and while these don’t run hot, they’re not cool enough for me. If you can get them for a good price then they would be fine for a guest bed.