They didn't scratch my skin at all and made my skin feel so soft. Don't push too hard when you rub it though. I did that and my skin was a little red afterwards. I did put a little olive oil (great skin anti-inflammatory) on the red spot and it went away quickly.

The cost is cheaper than razor blades, there is no smell to contend with, no risk of cutting myself with a razor or razor burn, and overall I found them so easy to use.