I worked with them in Desert Storm and they are not nice. They are in a similar league to land mines - long lived and indiscriminate, even if used correctly.
Used tactically they can take out airfields, command and control centres and ammo dumps. Let's hope that is what the US and NATO restricts them to.
Russia also has them and they have already used them in civilian areas many times. Please do not escalate this, it will not go well.
I do support Ukraine, but I am not uncritical about what NATO is doing.
The UK has one of the world's most potent CB weapons but we, thankfully, are keeping it at home.