I had two systems installed at the same time. The installation was fast and clean. The only part I question was the hours they worked on the installation process, the fist system wasn't finished until after 7 pm. The second system, done the next day, was not completed until 10:15 pm. I live alone, so in either case it was not a problem, had there been a family in the house, I'm not sure I would have agreed to the late work hours.
Perhaps an additional person should have helped on these two jobs.
In any case, would use them again, no problem.