This unit replaces equivalent Frigidaire A/C that served us well for 13 years. Bottom-line is that it works fine, it's relatively quiet and probably deserves a "4++".  One major improvement (IMHO) is the means of adjusting the Air Outlets. The old one had strange oval-shaped vents on a rotating shaft, and it was a bit tricky to visualize the direction. (The new vent setup is much more intuitive.)  Also, it looks like the air intake filter is a bit more advanced. 

The one annoyance is due to goofy Federal regulations: When it's turned on, it starts up in Energy Saver mode. So you have to reset it to "Cool", and re-adjust the fan speed.  Also, the remote control (while larger than the old one) is not very intuitive. But I find the little "old" one works, and it has more complete labeling; so that's what we're using. 

We trust the new A/C will serve us as well as the old one.