We got
No Mow Grass and though we mowed it the first year twice, after the second year, we don't usually mow it more than once.
They said that it should not be mowed ever during the summer or it also needs watering, which makes sense as grasses slow down in the heat, and the grass blades shade the soil to help hold in moisture.
We love this stuff and it only grows 3-5" high....so not much reason to mow it. So, if you have to have lawn grasses, then why use anything else?