Dr. Green takes all its money up front before it starts to provide services and fails to provide any kind of contract or written description of services. Based on my experience, that's because it doesn't know what it will be doing and by when.
Some guy came by and threw down dry fertilizer and left a note that overseeding would be done. It wasn't. In the middle of May I asked when aeration would be done and I was told they weren't sure, so I hired a different contractor to aerate. My credit request to Dr. Green was refused. I just got a note today from Dr. Green after two months of nothing, that some guy would. be by to fertilize in July. No mention of weed control because that ship has sailed.
In short, I have been looking after my lawn because Dr. Green hasn't. They take their money and you take your chances. It hasn't been a good bet for me and I won't ever use Dr. Green again.