Honestly I'm amazed at the results.. so far. It's still got a bit of work to do and a little overseeding but I'm happy.
My new build, clay soil, garden was a mess, just a boggy mess with little to no grass. I scarified, aerated, and put the seed down. I kept it watered, 3 or 4 times a day, and this is the result 4 weeks later. I've got the seasonal pack so hopefully next year it will not require such a drastic renovation.