Nagka bad experience kasi ako a few years ago sa Panasonic na WT AC eh. The compressor kept conking out on ALL the units we got and though they'd replace them under warranty, the AC's were in the shop for so long and often I'd sometimes forget we had them at all! We even had to buy several replacement units to compensate for those in the shop!
Not naman saying that ganun din ang sa split or even that the problem persists until now, pero dahil dun it'll be quite a while before we try Panasonic AC's again.