Glitches and failures too numerous to mention: does not play well with others (specifically Apple), loved by the tech-geeks but not so much by the home user (can't program your own stuff), frequent "unexplained" phenomena (can't change settings without rebooting, speaker zones stop working-reboot again); apps that are buggy and user unfriendly. Often have to remove/reload app to get it to work. App frequently shows system unavailable and requires contact with dealer (which is not true, BTW). So glad I did NOT tie my whole house to this system. Most dependable music is a semi-autonomous set up unattached to Control 4. I would love to construct a home audio/visual system without the Control 4 albatross.