10 years ago a control system would do its job fairly consistently and reliably with IR and RS232. it worked! now that control systems integrate with many other APP based devices, when the owners of those app based devices make a firmware change - they are indifferent to how it connects with our control systems. so the customer has to call the integrator and pay to have this issue fixed. until the next time. With the app, the firmware rarely affects anything else. no disruption, no service call, no fee. my customer stated that he felt like he had the last integrator on a retainer just to he could listen to music. another customers said his original C4 dealer had gone out of business and to bring in a new C4 dealer to fix his system was going to be $1800.