We have used zoysia sod on numerous customers lawns. It does very well in full sun and is drought tolerant. For some without the deep pockets we have purchased sod and made our own "plugs" with good success. You can spray it when the zoysia is dormant to kill most cool season weeds but it seems that the control is limited where there is abundant warm season weed growth. If the weeds get out of hand they do not need to get to tall before they will begin to shade out the zoysia. This is just what I have observed after going back to customers lawns a year or two after completing the job. The customers that have a good lawn care program set up for their zoysia have great success. The customers who are not vigilant in caring for their zoysia have limited success.