The fit is not adjustable (the hooks stubbornly retain their shape). The connector housings are a bit too large, causing minor discomfort. These will work with UE TF-10s, but they will not be comfortable due to the large size of the IEM and the stubborn hooks. IEMs with a slimmer profile are probably fine with this cable. Definitely not worth $80, but on sale for $19, they're not the worst.
Wire is small gauge and feels fragile. Smaller and lighter gauge wire than the OEM provided cord. Product returned and had no problems with the return from Drop.