Been playing for quite sometime 23 years and tried different horns in the past. Recently my friend called me up to fix his Selmer Super action 80. After I did some leak fixing I compared them both. Under my fingers the opus just felt better accept for the mother of pearls. The tone had more core on the opus and it just sang alot easier on both registers upper and lower. They both played in tune as well. The opus is well made and soldered well together. I was so surprised and glad I go this horn as a gift after my yamaha 82z was stolen last month. I'm pretty sure my opus is made in china but it does not say nowhere on the horn.