Some of the percussion instruments in GPO are either totally unusable, or else there are some other conditions I'm not aware of. Specifically - the orchestral tambourine has no jingles and sounds for all the world like a toy drum. Can't use it at all - and this is not a minor loss, either. Similarly, crash cymbals: the default cymbals in GPO are also very tinny and not at all resonant. I have to use "marching cymbals" to get something that at least sounds like the "real thing" - but it "insists" on a five line staff, which makes no real sense. Thirdly - what about suspended cymbals? Any thoughts on these pesky issues?