I have had a Progression Integrated Amp in my primary system for about a year. I have had no issues or problems at all. I recently attended an event where there was a rep from D’Agostino, DCS and Wilson. The D’Agostino rep gave me his card as a contact should I ever have a question or issue. That may be just good PR but it made me feel more confident that they would stand behind their product.
I imagine it would be helpful to purchase any high end gear through a dealer that has a good working relationship with the manufacturer. In my case, I have purchased all my equipment through Audio Concepts in Dallas who sells all the equipment t I mentioned above