Not like us was much better, a few bombs that achieved nothing since Iran moved out everything couple days before...
If we were to believe what is being told publicly... I think that warning before the attack was a smart move or there would have been a great risk of nuclear contamination if Iran wouldn't have moved their uranium. From my understanding, damaging their nuclear installations throws them back a few years, but surely it doesn't stop the process if the same regime with the same intentions continues in power.
Ceasefire is only a step. If peace conditions don't deter Iran from pursuing an aggressive stance, things will likely escalate again in the future, one way or another.