I got my irrigation system winterized this year by Naiad. It was very easy to set up a time for them to come out. They told me the cost upfront which was nice. They sent me a reminder email a few days before they came out and sent an invoice when they were done. I set up automatically billing with them so it was very painless.
I didn't have to be home when they did the work and they left a sticker outside to show that they serviced my system.
They were professional, fast and efficient and it doesn't cost much. Will definitely use them again.