Whenever I examine the concept of rebirth in Buddhism, I cannot help it but feel great skepticism.
To put it in my own clumsy words, we have many fears and one of the greatest is to cease to exist. The solution that I have found in Buddhist teachings is to outgrow that fear in particular and fear as whole, while you're at it.
In contrast to that, religions commonly introduce some concept of life after death. Which I think is a just a very comfortable delusion, self-induced to cope with this primordial fear and with the loss of loved ones.
What strikes me is that "Buddhists" talk quite a lot about rebirth and will actually give extremely precise and concrete responses to questions on rebirth, that can quite obviously not be challenged by the examining mind. It is my (limited) understanding though at its very core (if such a thing exists) Buddhism generally denies to answer any questions that cannot actually be challenged and particularly denies to answer this question.
I feel that much is to be gained from the concept of rebirth if explored as a metaphor, but it is my impression that believing it literally is diverting attention from the here and now and more practical aspects of Buddhist practice, thus ultimately being harmful. It seems to me like failure to remove the poisoned arrow.
At the same time it makes me nervous that I cannot see any truth in more physical and concrete notions of rebirth, because it's far more likely that I am just blind, rather than everybody else being deluded. So: what is it that I am missing? What do I gain if I embrace the belief that "I" will roam this world in a new body once this one dies?