I'm using Schwalbe pro one tubeless and use stans sealant. They stay sealed on November Rails after the first ride. Initially the tires were losing air when I first installed them and the next couple of nights of them just sitting but after the first ride they have stayed properly sealed up.
I like them and find the ride is pretty darn nice. Installing them took a bit of a learning curve but once I knew how to do it everything went well. The tires out of the package were very tight, so you have to make sure that the bead is seated in the shallowest portion of the rim during installation.
I have not had a flat with them yet, so that is good.