I used to be a Panasonic fanatic and I can say they are one of the best before. My first aircon is a Panasonic 1HP (National - the old name they use). It lasted more than 15 years before it gave in. My 2nd and 3rd Panasonic is around 10 years now and they are still working. However, when we renovated our house 2 years ago, I bought 4 brand new Panasonic window type aircon with remote (2 units 1 1/2HP & 2 units 1HP). Sadly after just 2 years, 3 of the 4 had a leaking evaporator
So I guess I'll be staying away from the Panasonic brand for a while. I replaced the first one with an LG which comes with a 5 year warranty on 5 major parts including the compressor, evaporator and condenser. Hopefully, it won't give me that much trouble...(with finger crossed)