Just had our wills (my husband's and mine in similar form) signed and sealed yesterday.
It covers guardianship for our child(ren), executors of our wills, responsibilities of the executors, how assets will be handled/distributed in the various circumstances etc.
While it is not necessary, for expedience the lawyer advised to have separate wills set up in countries where assets are held so that it won't take a lengthy period for probate and grant to be given.
Cost us HKD3,800 for both wills.