Here's some info I found searching around a little bit. HVAC tech discusses York at the 3:20 point in this video. Consumer Reports ranking for AC reliability at the :40 second mark in this video. First 4 responses in this thread. More York information in this thread.

rigneymark,

the model number you provide is not right. York is comparable to just about any brand out there when considering their AFFINITY line systems. The only real way to go to this level is to replace your entire HVAC system.

The York LX line is low end and micro channel. Really the only advantages to this York equipment line is lower cost and smaller form factor. In tight space installations you may be forced to something like this because nothing else will fit in the space. It's either that or spend more money to relocate the condensing unit.

Micro channel coils wind up costing you more over the life of the equipment, either due to leaks in the coils themselves or more work making repairs to your system.

Details, Details.