I have tried treating my lawn myself with poor to OK results. I then tried Lawn Doctor and was very pleased with the results! Do the math you can buy your own lawn treatments and have to much or to little. Having Lawn Doctor do it is always the right amount with a lot better products that you cannot buy with out an applicators license. You cannot go wrong! I have been a customer for 4 years with one property next door that does nothing for treatment just weeds and my lawn looks great!!! Thank you Lawn Doctor!