I don't know how to rate gutter cleaning service other than by looking at debris at the bottom of the downspout. By this criterion they clearly did flush out the front gutters after first vacuuming them. I
didn't see debris in the down spouts in back but they told me that the back gutters were good.
The crew were pleasant and professional. They did not take very long. Like another user I would have liked to have them call ahead so I could know when they were coming...and give them access to a hose connection. Fortunately I was home when they arrived.