I have now installed three mini-split heat pumps. I would only recommend the MrCool ones as the flared line sets seem to always leak. One of the issues is in covering the line sets. Some people use the plastic eves, and I have done that as well on an existing HVAC installation. This one installation took two of the line cover kits at $39 each, and then I was still short one straight coupler. So I designed my own couplers and 3D printed them.
Here is a picture of the first two couplers that I designed. Later I came up with a design with hidden screws. I did not have white filament so I had to spray paint them to white. My designs are on thingiverse.
