well one of the units had a bad compressor right from the factory, will let you all know when I find out how much that costs to replace. I find this technology quite cool and interesting, but the price of it vs a regular oil fired furnace is huge, so unless I had all kinds of money to spend not really an option, and I imagine the light bill would be signfigantly higher also.
Hopefully nothing will go wrong once it is in the ground sir! It will be very costly if there are leaks that develop over time. Great money saver though!