I'm thinking Samuel D. may have the wrong company, as there is another NI located in Worthington? Chris Kolb of Nationwide Irrigation installed a system at my home, as well as my mother's. I wasn't even home when he and his team came to my house to do the install. I just told him what I wanted, set a temporary garage code, and he did the rest. Some of us can't be at home all day because we're out working, so this was awesome!
I actually ran across this review on Yelp! because I was looking to sign up on their website to have our irrigation systems winterized, and was going to pre-pay online. If the review is a legitimate review on the right company, I'm surprised that there aren't any specifics as to what was done incorrectly, or not to his satisfaction. The only thing he specified was the name of a competitor to use instead. Which leads me to believe that the review isn't legitimate. Usually when people complain, they will be very specific of what the business did wrong.
They don't even do any advertising; their business runs on word of mouth. My mom is one of the pickiest people, and even she complimented on the way Chris ran the water supply line through her finished basement.