For myself, I feel the 1/2″ thick is comfortable. Beats sitting on dirt, rock or pokey grass. I’m sitting on it in my profile pic. At 1 ounce, I can carry it wherever I go and not just keep in camp. I’ve used a full size Plastazote 72″x20″x 1/2″ mat as my only sleep pad before. Lighter than Evazote. 8.70 oz ea. They’re comfortable, for what they are. Don’t expect them to be more. Best if you’re mostly a back sleeper. Not so much if you side sleep often. The simplicity is great and it helps correct posture. They’re lighter than a comparable mainstream CCF pad, but can be bulky to pack. I’ve carried two at times if really cold. At 1″ the extra pad is nice and noticeable. I roll and strap them on the back of my pack with bungee cord. In this picture, I have two strapped on the pack. You can see one. Got down to 22 degrees that night. 1″ of Zote was plenty. I’ve taken 1″ down to 7 degrees.
