Your mutual needs for partnership and security within the relationship will be a close match, which will make it easier for you both to build the kind of connection and commitment you're looking for. There will be constraints that come along with this, however. You might both feel obligated to stay in this relationship, even if you're a mismatch in other important ways.
Even if you don't communicate well or you lack a passionate connection, you'll still feel as if you should stay together -- bound by a sense of duty or necessity. This relationship will bring both of you a very real sense of security, but one that is bound up with responsibilities and other limitations. You might find each other's careers or families to be an unwanted restriction on your own life and time; you might even feel your relationship itself is a restriction on your freedom, but you won't know how to disconnect from it, or you simply won't want to. Still, overall, the stability and security you'll get from this relationship will be right in line with what you're seeking from this partnership, which should give you both a sense of satisfaction.