I have used WeedMan services for approx. 15 years. I have always found them to be efficient and helpful, (they never forget to inform me of their visit the next day, so that the garden gate is unlocked and the car removed from our grass driveway).
My lawns always look great, and any weeds that do appear have only done so since the municipal ban on certain herbicides, over which WeedMan has no control.
Their employees are inevitably polite and courteous.