The FreeBuds Studio are impressive in terms of workmanship, runtime, features and sound, although the latter is only really excellent and balanced if the ANC remains deactivated. Although the ANC does a solid job, especially due to the constantly adapting dynamics, it falls short of expectations and possibilities due to the strong background noise, especially in Ultra mode. The fact that the optimal performance of the FreeBuds Studio can only be unleashed with a cutting-edge smartphone from the same company is, in my opinion, a minus point for these headphones, they are thus probably a little too far ahead of their time, but this is not to say that the headphones sound dramatically worse when used with iOS or an older Android.