I have never taken the time to upgrade the onboard instruments in Logic Pro but recently thought I'd do so. I was really amazed at how incredible the updated instruments REALLY are! I've used the older versions of the Logic Pro X onboard instruments for years and thought there was no sense in updating ...but... The new and upgraded instruments are quite remarkable. So if you are like me and didn't think it was worth re-downloading the massive Logic Pro X instrument files, think again!