I had a Mypillow for a year prior and switched to the Casper, the Casper pillow is much better than the others. It’s soft on the outside with a down feel, but has a nice supportive firm core that doesn’t collapse overnight.
Having a Casper mattress (which I absolutely LOVE) I expected the pillows to be as amazing. They are no where near as stellar. The anticipation sure didn’t live up to the hype I had created in my mind. They are not as hard as I envisioned or as thick as I expected so I still am using two pillows to be comfortable. They do keep you cool though if that’s something you enjoy.