Brian Klose came by this morning at 9am to spray the six shutters on the front of my house as there were yellow jackets nesting behind them. This is the first time I had used Green Pest Solutions. Brian explained what he was going to do and then did the spraying. He was well spoken and well dressed in his uniform. He explained that it would take 3-5-7 days to kill the yellow jackets with a residual killing effect for 30-60-90 days. I just noticed that there are dead yellow jackets on my driveway, under my front windows so the spray is working. Cannot say the long term efficacy of the treatment as it was just done 8 hours ago. However, Brian is an excellent representative of his company.