SubZero is known for being the best in the industry. It's amazing how much longer food lasts. They are expensive though, so if it is in your budget, I would absolutely recommend.
I did have a problem with the ice maker freezing up, but reading the service manual figured out that the drain heater just needed to be tweaked a bit (it also doesn't hurt to turn off the ice maker when nobody is going to use ice for a while)
Considering the possibility of my refrigerator doing finishing moves is an extra bonus.
It's not very efficient, when it comes to power consumption.
But the freezer is huge, and works for this family.