Scott using reflective acoustics is OK for special room situations I''d say less then 10% of the time, its up to you the musician to make the call & assessment when you read the room during your setup & sound check using YOUR PA system. Combining wall deflection, floor monitor style Ceiling bounce diffusion, Side angle positioning, One up/One down/ etc. Each performance, Each room is different, be ready to change your setup on each one if needed. There is no staple formula....just PLAY The Room with YOUR ears!