They are a sales company that happens to sell landscaping,churning 30% of their customers should tell you everything.
Go check these guys out and DIY https://www.siteone.com/home/locations.aspx
I wish I could show you the excuse for soil was when we built with Rockford,we got 50% rocks lots of clay and some clean dirt as a afterthought,miracle anything could grow in it let alone look good.
Aeration to get air into the clay helped seeding and getting the root system deep with Fescue was the winning formula for us,still learning this stuff but we got a good grip on it.