I'm not sure about the 13 SEER units, but I installed one of the YZH series (2t/3t, two-stage, 17.5 SEER) about 2.5 years ago.
I love it. It is so quiet. You can hardly hear the thing even when standing next to it. Physically, it is a large unit (and most newer units are...especially with more efficient units). In my case, I was going from electric furnace to heat pump, so I was switching the inside and outside unit. I also had everything open for reno work, so I ran a new lineset as well. Also, since it is a two-stage unit (and also a heat pump vs. the A/C only old unit), I needed to run more control wires as well.
In the summer, it runs on low stage most of the time. It will also slow down the indoor fan and use the A/C to dehumidify (when humidity is high, but the temperature isn't). It is also smart about when and for how long to defrost in winter (save some money).
I haven't had any trouble at all with it. I think with most units (any brand) that the install is just important (or moreso) than the actual brand in terms of how it operates and preventing issues. Also, make sure that they use a nitrogen purge while brazing (especially if going to R-410a). Oxygen in the line will cause deposits when brazing. This can then get washed off and mess things up. After everything is together (but before refridge is released), the system needs to be connected to a vacuum pump (pump down to below 500 microns) and be held there for 15 minutes or so. This will remove any air/mositure for the system.
Any good installer will know what needs to be done, but they may still try some shortcuts to save time.