"I couldn't be happier with Haller. From start to finish they were prompt, professional and impressive. The salesman answered all my questions quickly and thoroughly, and the men who did the work on our house were knowledgeable and went above and beyond to make our system the best it could be. I'm VERY glad that I chose Haller. We had looked at four other potential companies for our geo system. Haller wasn't the cheapest, though they were competitive, but they offered the best combination of price, expertise and service. I'm thrilled with our decision."