This is the 18k BTU DIY model (single zone). Can't really complain about the performance. It's cool that I got to see a defrost cycle actually run and, well, defrost the coils.

Winter Storm Bobby, 2022.

Update: This unit failed and I upgraded the outside unit to a Gen 4 (under warranty). Here is how the new one performs at -8F:    • Mr Cool DIY Gen 4 @ -8F: Does it heat?