E3xtc:
sonyxperiageek: So I've come to a bit of a road block at the moment... Just been comparing the Mitsubishi GL and the AP with the Panasonic VKR and in terms of specs (the 5kW model) it looks like the VKR Trump's the GL and AP by a few things like better cooling/heating capacity range, sound levels, and importantly the EER and COP values. So on paper, I'd be looking at choosing the Panasonic, but am also wary of the OP issues... Hence the road block.
Guess it's time to have a look at the Daikins.
If everything still stacks up in Panasonic's favor, voice your concerns to the installer/provider and get them to assure you with respect to the Panasonic units, then if these weird things crop up, its on them to remediate (if you have the mental fortitude to struggle through what could be a pita process till solved). We have a Panasonic ducted unit so could very well be totally different, but this at least seems to work just fine.
I'm going down a similar path looking at a split system, 50kW downstairs and 20kW unit upstairs in the bedroom. I've looked at Panasonic (VKR) and Daiken (Cora) which are priced $150 of each other and Mitsubishi EcoCore AP series which while a more recent model is additional $2K. Mitsubishi is out based on budget and I feel I'm leaning towards Daikin.
Did you have a look at Daikin? interested to see what your assessment is or anyone else's experience.