The sound is amazing and very stability when wearing correctly. However, the special attention and almost always multiple reseats needed to wear them correctly is also a minor complain from me.
After a month of using them, I still need to readjust and reseat them quiet a few times before they fit correctly. If the buds have a more obvious reference point to help holding the buds for correct angle for the initial insert, it should help the success rate of getting right the 1st time. Maybe a colored line, or something for finger tip tactile at the top of the buds. The buds are oval and hard to tell where the tops are supposed to be.