I bought this air conditioner to cool a 15x20 bedroom (just at 300 sq feet it is specified for). I live on the top floor of an apartment building which gets pounded by the sun so the room temperature often exceeds the outside temperature due to the greenhouse effect. I also avoided getting a small window mounted unit since there are child guards installed and I did not want to remove them. I was initially concerned there would be enough clearance between the window guard and the exhaust hose, but that turned out to be a non issue as the hose is flush with panel and does not protrude at all.This a/c was easy to install. The only restriction is that I had to wait 24 hours for the refrigerant to settle after shipping and delivery. The sliding window panel was too long and I had to cut off about 8 inches so it would fit my window horizontally mounted. I used a Dremel tool to do that and it only took a few minutes. Everything else including the exhaust hose (required) fit together perfectly. After physically installing in place and waiting the requisite 24 hours, the a/c turned on successfully and cooled my room within an hour. I've been using this a/c for almost a month now and it has not disappointed me at all. The filters are easy to remove, clean and re-install - the lower filter needs to have the exhaust hose temporarily disconnected from the unit but it's a snap to remove and replace. In the first two weeks of use, the filters were full of dust and fur from my cat so it's important to clean the filters every two weeks as recommended in the instructions.Here's a summary of what I like and dislike - Likes: small footprint, compact, reasonably quiet, efficient, easy to maintain, no need to drain water, caster wheels, easy installation, quick cooling. Dislikes - I wish the control panel was mounted on the top front of the unit just above the vents, instead of on the top, so it could be visible from across the room. A remote is supplied with the unit but I did not use it yet. Overall a very nice unit at a good price/value point.