I tried a 1500A for the first time yesterday. What a horn! The sound was absolutely fantastic, and I thought the response was very good as well. I expected the response to be slower since the horn is heavier than most, but it was surprisingly good. The horn was very easy to play. Flexibility was good. I compared it the Kanstul 1500 (and the Conn V1). For my playing and preferences, the 1500A > 1500 > Conn. Fit and finish on the two Kanstuls was very good. I did like the feel of the flat valve tops on the 1500 better than the pearl tops of the 1500A. This will be the next trumpet I purchase just as soon as I can sell some other trumpets to finance it. Wife is wanting me to go to bed, hope to post more later. Great job Kanstul!