Use flash, Id rather have a neutral sound stage and adjust the EQ to my liking! I?ve had a rather fickle back with several herniated discs for a couple of decades so comfort and stability are premier for me. You have to have some for bone conduction to work. Wow, these are NICE. They dry out fairly quickly as well! I dont walk flatfooted! As long as you know what youre getting into, you should be fine. I have not used many of the functions but enjoy checking out the sleep tracker and use the pedometer and heart meter occasionally. I have them in black tan and this I use it for interval training, so no prolonged use.