are baby rockers really helpful in putting baby to sleep? is this gear really necessary or just a waste of money?

I used it for my daughter and I would say that it is a really must buy. Even if the baby doesn't sleep in it, there is this thing where you can put the baby and carry her wherever you are. Once in a while rock the baby when he is awake, and the baby likes it and also plays well in it. Also that she can see you all the time from the rocker, he doesn't want to cling all the time. You can do your work and at the same time talk to her play with her. And who says babies do not sleep in the rockers. Only when they are too cranky they may need to be held for a while but when they have dozed off you can again put them in the rocker and they will sleep nicely.