I don't offer any gaurentee on lawn renovation. Even if I maintain it. There are so many factors that can work against you that it just isn't worth it. I've never had a lawn fail, but I've had sections that have failed for one reason or another. Usually it's a soil problem of some sort. On cutomre had an area that just woundn't take. I suggested another soil sample, but he decided it was a good time to tell me his son used to "change his oil, and flush radiators and stuff" in that area.
"We contend that for a nation to try to tax itself into prosperity is like a man standing in a bucket and trying to lift himself up by the handle." -- Winston Churchill
"I cannot undertake to lay my finger on that article of the Constitution which granted a right to Congress of expending, on the objects of benevolence, the money of their constituents." - James Madison