I cant speak of Harman's customer service. They make a good product. The reps I have met have been nice. Dane is a great guy and extremely intelligent, I enjoy every time I run into him at a show and get to speak to him. I always walk away smarter. The current stoves are still his ideas and are terrific. I would not be afraid of anything they make. ( that we don't
We do not make any hand fired stoves yet.
Another great product is the Hitzer, great people very involved in there business and very high on the customer satisfaction list.
I have no direct personal experience with DS machines. But they seem to have a great product as well from talk around the industry.
Basically anything you go with from the major players you will be satisfied. Shop for what grabs you attention and price range and decide what you want it to do. Stay away from the box store stuff. Good for short term is my understanding.