It depends if I'm seeing any improvment. I can't take a screamer for very long, but crying doesn't bother me. I had a crier for 3 straight weeks. Week 1 she would crawl to the door and stand there crying until food came around. She'd also cry her way through quiet time. On week 2 she still crawled towards the door, but I was able to take her outside without too much noise and she started to sleep for an hour during quiet time. Week 3 she was just overly demanding. She stopped the crawling to the door, but everything would make her cry... a toy taken away... a loud noise... diaper changes... etc. Now, she's a pro! Comes to my arms, smiles and giggles, she's my most mobile so I don't have to carry her anywhere and she sleeps for 3 hours every day.

Sometimes they're worth holding onto. But only you know what your limits are and what you can take.