I've been using Daikin for almost 9 years. Good product, especially its inverter line. Performance wise its just average. Panasonic is just popular because a lot of major electrical stores has them. For my next AC, its going to be York. Famous for being reliable, durable, and strong compressor even after so many years. Its also known for its noise, but it doesn't bother me that much. So far, I know York and Daikin now is under one company, there's another brand with them too, forgot what it was.