I signed a contract for 2015 and pre-paid the entire season to save vs monthly payments. At the end of the year my lawn was thicker and greener, but weeds such as "creeping Charlie" were still present in my yard. From what I have read this particular weed is nearly impossible to kill, so it's not totally their fault on that one. Overall I was not satisfied with the results for my lawn and did not renew for the next year.
After each application a small sign is left in the lawn. One warning on the sign is not to water the lawn for 24 hours after application. On one ocasional an application was applied before an imminent downpour and one other application during a light sprinkle. Not sure of the implications of this, but seems odd since they tell me not to water for 24 hours following application. Can't they check the weather forecast before applying?
In 2016, spring green resumed service even though I never requested it or signed a new contract. I paid late for the first two applications hoping they would get the hint. Then I paid a bill after another application and wrote PLEASE STOP SERVICE on the check. After yet another application following the notice on my check I stopped paying, since I believe I had provided sufficient indication I did not want the service. Now they have turned over the last bill to a collection agency. Ah, they joys of dealing with an incompetent local business. Their service is probably fine if you have an already nice lawn, but it only marginally improved mine. And it seems they don't understand the notion of a contract.