When it's working, it adequately syncs my three Bluesound players and the sound quality is very good (more a function of player quality than the BluOS). But, it really is the most annoying and unreliable app/software I've ever tolerated. Updates are FREQUENT, during which the players are crippled, and after which there is no obvious improvement or user benefit. Usually I can't update the players simultaneously; three players means thee long updates with the whole system down.