I have a 4 ton 13 seer American Standard AC unit that's 10 years old and unfortunately on its last leg. I love our vendor (the original installer when the home was built) and they seem to prefer ever-rest. My problem is I am not at all familiar with this brand. I liked the lifetime compressor warranty but didn't even know if that was standard for the industry. Anyone know of this brand? Reliability and longevity are the most important things to me.