Definitely works more effectively than my previous 12,000 BTU unit. Has a smaller footprint which is nice and unless it gets extremely hot, the low fan setting is all that is needed. Slightly louder than my old one, but quiet enough. I've just had this for under two weeks and being in Florida, I won't be using the heating portion for some time, so this pertains to the cooling only. Because I replaced an existing unit, setup for me was pretty easy and may have been easier than for the uninitiated, but the instructions provided are understandable and clear. Only downside to this model is that it lacks an "energy saver" mode where the fan also shuts down above a set temperature which is helpful when you're gone all day. Otherwise, working very nicely.