I have not used them. I have the Velocity Dyad (non-tubeless) rims on my light touring bike.
The Cliffhanger is for wider tires, has the shelf for the bead for tubeless.
https://www.velocityusa.com/product/rims/cliff-hanger-622The Cliffhanger is listed here as a strong rim, this graphic compares their rims for strength and tire width, note that they only list the Dyads that I use for touring as medium strength:
https://www.velocityusa.com/tech/rims/Note that they come with machined sidewalls for rim brake or non-machined sidewalls for disc. So, decide which version you want.
My bike with the Dyads, that has rim brake front, disc rear. I bought machined sidewalls for rear too so that the front and rear wheels visually match for aesthetics.