HUGE minus point for me is that they cannot connect to other devices if you do not unpair from the original device first. My other JBL headphones start and connect to the latest device, but if I go on another device where they have been paired and press "Connect", it connects with no problem, but not these earbuds. So I am often contemplating if I should even use them, because I don't want to go through the hustle of unpairing, then bluetooth mode, then pairing and in 3h again the same process in order to pair back to my phone or tablet. Very horrible.
Also my ears hurt after a bit of time, because I have to really push them in in order for them to not fall out. Mostly they fall out if I'm chewing or moving a lot, but also sometimes just fall.