Upgraded from the EP-T21 because these have a more ergonomic design and the T21s kept falling out. Maybe I got too used to the T21s sound, those were a lot more balanced. The bass on this model is a little too heavy, makes me want to actually use Bass Reducer on my... Upgraded from the EP-T21 because these have a more ergonomic design and the T21s kept falling out. Maybe I got too used to the T21s sound, those were a lot more balanced. The bass on this model is a little too heavy, makes me want to actually use Bass Reducer on my phones EQ. Im sure Ill get used to it eventually. This model definitely stays in my ears a lot better thanks to the design though. What I wont get used to is the way they designed the buds to fit in the case. Someone thought itd be a good idea to flip the buds in the case the opposite way they go into your ears. It wasnt a good idea. Theres really no easy way to seamlessly take the buds out of your ears and put them back in the case because they need to be flipped. Really not the smartest design. Edit: To further talk on the case design, there's literally no way to take these buds out of the case without triggering some touch function. The magnet for the case is also too weak. The touch is also way too sensitive, putting them in your ear also triggers all sorts of functions. And since these buds use an individual Bluetooth connection for each ear piece, one side may randomly decide it doesn't want to work until you put the bud back in the case and take it out again. Absolutely horrible design choices here, so much so that I had to knock off a star. I can say I've gotten used to the bass though, so there's that. *shrug*