These hooks came in handy because my balcony stretches from wall to wall and ceiling to floor. Therefore is no space to put traditional rod hooks. They were very easy to install, they do come with all sorts of hardware but I just used two of the regular screws for each hook. The only issue I had is I wish the hooks length was a tad shorter so my curtain would be closer to the sealing. I wouldn't recommend using the curtains with curtains with the circles because if you have floor to ceiling windows your curtains will not touch the ceiling. 

Pros: Easy Install and hooks came in handy because my balcony stretches from wall to wall and ceiling to floor. Therefore is no space to put traditional rod hooks.
Cons: The only issue I had is I wish the hooks length was a tad shorter so my curtain would be closer to the sealing.