I have used many, many of command hooks over a few years time. I generally love them. I have landlords that don't want holes in the walls and some of my pictures don't have a hanger for a nail to go into.

This last summer our AC broke and it became very hot and humid in our apartment, our pictures all started falling and breaking! Also, they don't stick to wall paper. So, that is why I don't use them anymore.

But if you don't have wall paper and your AC works fine they they are great.