9 years ago I bought a condo which came with a Goodman AC that was only a few years old. Unfortunately, it was poorly-installed and never was able to properly cool the house, along with $300-$400 electric bills as an added insult. After consulting with multiple contractors, the consensus was that the ductwork needed to be replaced, and refrigerant lines needed to be replaced (kinked line). After all of that work, it seemed natural to replace the nasty, noisy Goodman with something better. Enter the Carrier Infinity system. It's multi-stage, so it's usually running on low all day long. The Infinity controller does a good job of making sure humidity stays under 47% and there's usually a steady stream of water trickling out of the drain pipe all day long. With the way we did the ductwork and vents, the air handler is dead silent. Literally, you can't hear it running. Even with the mechanical closet open, you might be able to hear a faint movement of air, but not unless you're standing within a foot of the unit. The heat pump outdoors does make noise, but it's quieter than anything else in the neighborhood. It sits right by my patio and doesn't intrude on conversations like the old Goodman heat pump did. My neighbor's AC across from me is louder in my patio than the Carrier. Heat-wise, we've locked out the electric back-up heat, so the heat pump has to carry the full load. And it does so up until it gets below 20F or so outside. On those cold spells when it barely gets to 40F outside, I'll just leave the heat pump running 24/7. It may not have enough capacity left at the cold temperatures to increase the indoor temperature, but it has plenty to keep up with the heat loss of the condo. Dislikes? It's big.. very big. Enough that the HoA complained to code enforcement. Code enforcement told them to deal with it — it was properly installed and all the new equipment is larger. Repairs.. so far, none…and I hope it stays that way. I'd imagine parts for this won't be cheap. All in all, very pleased. Would I replace it with the same thing again? Absolutely. When it was time to replace my parents' AC system, I put a Carrier Infinity in there as well. Even at a beach location it still handles the humidity well.