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From the beginning,GNI was prompt, efficient and professional. Their work was superb and clean-up was flawless. I have already recommended them to a friend.
We have used Great Northern for two of our houses now, and we are very happy with the results. The technicians were friendly and explained what they were doing and were very tidy. Jason in the scheduling department was very accommodating, with all of our requests, as was everyone one else who we dealt with.
GNI provided an outstanding service and have professional and pleasant staff. The salesman was knowledgeable and the crew completed the work on time and did an excellent job. I would definitely use them again.
Very professional, on time and clean up after themselves!