Yes, I've tried it. I works well but I've had luck using store brand products as well. The weed and feed is a must and in my opinion, the most important part of the service. I even use the Scott's weed and feed and then for the remainder of the year, I'll use a store brand application, either from Farm n Fleet or Lowe's. But I'm sure any home and garden center has adequate products. Scotts.com even has a section where you can sign up for application reminders, e-mail tips, etc. Hope this helps.
They gave a very thorough free report and analysis. You don't even need to use them to get it. When I talked to the technician he was very knowledgable on the chemicals they were applying. Whether they were harmful to pets, kids etc. And if I needed to water and cut before or after application. This is the first year I am using them so I will see how green my lawn gets.