I'm in the camp with Jennifer L. and Carrie W. My kids only sleep in their beds. The only other place they might sleep is in the car. Sometimes that can't be helped and it's too difficult for me to try to keep them awake and still focus on the road. You always see posts about sleep problems and how to get kids to sleep in their beds, get out of their parent's beds, etc. That solution is to teach them to sleep in their own beds from the beginning. Then, they don't know any different. Unfortunately, that takes work and consistency from the start and it's really hard to do in the middle of the night. Even last night, my son woke up in the middle of the night for no apparent reason and just would not go back to sleep for over 2 hours. I did not bring him into my bed. He stayed in his bed and we just dealt with it. I guess I would say that if this works for you and your family, then you do what you feel is right, but know that the consequence may mean that you have created a habit that will be hard to break later if you find you no longer like that arrangement.
I realize that a lot of these situations arise out of desperation for sleep and I'm exhausted this morning from being up half the night, so I'm not knocking anyone. I'm just saying that if it isn't something you want to continue, I wouldn't start it now. Just teach her to sleep in her bed when she's tired.