I was quoted for the job to have drip lines installed and plants planted. The job ended up being less work due to the drip lines already being installed through out the entire backyard, I didn't find that out for sure until the day the work was in process. All they had to do was tap into it. I still had to pay the full quoted price. Yeah he said he would run additional drip lines to another part of the backyard to make up for it and attach lines off of it every 3'. When I got home I realized they didn't have to run any more lines, just tap into that one as well. In the end the job is done, so I guess that's what matters. Just know that whatever they quote you, it won't be less even if they have a lot less work to do.