I have two Water Furnace units in my house. I have had so many problems with both units its unreal.
Ive had multiple boards go bad, both compressors fail, pumps go bad, you name it. The finally swapped an entire unit out because of all the issues. When they work, they work great.
Unfortunately they are extremely unreliable. The savings arent worth the extra upfront cost and the constant headaches when they need repaired.
Reason of review: Bad quality.