1st yr of Frechette service I noticed a 40% positive result; ok. 2nd yr significant improvement; very pleased. This time last yr I had zero weeds; ecstatic. Now, I have more weeds than when I first began the service; disappointment understated. Customer Service extremely friendly as are the crews. I will allow them an opportunity to fix before end of season. If no discernable results, I will have to look else where for next season. I hope they will correct and not tell me I have to be patient because it takes time. Not what customers wish to hear after a few years.