I think you pretty much pointed out all the good aspects in this synastry, for example:
Vertex connections to personal planets usually mean this is a significant relationship. Vertex/Mercury and Vertex/Venus. Often leads to marriage, or children.
Her Sun in your 7th, your Sun in her 5th.
Quickly looking over the chart I see:
Sun opp. Venus is hard to work out. Her Mercury Square Moon is makes for communication problems. But then again, your Mercury in conjunct her Moon.
Your Venus square her Neptune is relatively good. You are each other's dream mate.
Mars/Jupiter square can be troublesome. Causes arguments, competitiveness. These two planets don't get along.
Moon in the 6th/10th, did you meet at work? Not a very good position for personal relationships.
As for the composite, I wouldn't bother looking at it unless you are married or living together. I've always thought composite meant two people working as one and this doesn't really start until you both become "one". Even then, composite tells you how the world sees you, not how you relate to each other.