Grizzly Mill DRO

I have a Grizzly G9902 vertical mill. Grizzly is recommending this for a three axis DRO: 15-3/4" x 15-3/4" x 31-1/2" 3-Axis Mill DRO - Grizzly Industrial

I am not really that concerned about cost, I want something that is of good quality. Is this it? Thanks.