The opposition of composite Mercury and Jupiter is one of the less difficult oppositions. Like all the aspects between Mercury and Jupiter, it broadens your consciousness, making both of you more tolerant and broadminded, especially about faults in each other that might otherwise be sources of disagreement.
One effect of this aspect that you should watch for, however, is that you may get into ventures that are simply too big or grandiose to be realized. This is especially fatal in a business or professional relationship.
Another area of possible difficulty is that you may expect too much of the relationship. Although you are tolerant of each other, you expect to accomplish things that cannot be accomplished in any relationship. Try to keep your expectations down to earth.