So I got this last spring 2015 for an extra bedroom I have. Model MM14CCS. Usually its the one my mother (or someone else) uses when they come to visit. I have security bars on my house, and I dont have any of those a/c cages for window units in that room. Was looking for a quick solution when someone comes over, and I can just pop it into the window really quick. So what I did was get it all hooked up like I wanted, and then just took the hoses out all in one piece and lay them on the floor until needed. I dont really worry about anyone coming thru the window when the hoses are in because it does have the security bars there in the window. I can just close that window back up and lock it. Yes I did say hoses. I got to looking at the back of this unit, and there are 2 big holes exactly alike. One is the exhaust and the other is an intake. The unit comes with a little cap that goes over the intake with a screen to keep objects from being sucked inside the unit and to keep dirt out, I guess. I got to thinking about it and wondered if I just got another one of those connectors, would it fit in the same way and I could make it into a dual hose unit. Hmmm I popped the one I had on there from the exhaust side, and sure enough it locks right into place. So I found another one online, and got some of that dryer vent hose as you can see in the picture, cut another hole in the window bracket (be sure you know what you are doing) and connected it all up. Wow what a difference it makes on the efficiency too. Before it was sucking out all the cool air in the room, now it doesnt. You will notice that on the exhaust hose on the left in the picture, I have it wrapped with some insulation. I have them both wrapped now. This really helps keep the heat out and with the noise. The air being sucked in isnt nearly as hot as whats being blown out, so the cheapo hose works just fine. Just wrap them both really good and it will help tons. Mind you I do live in Texas so we do have 100+ degree days, and horrible humidity. Now when I use this unit I have a 25,000btu and 12,000btu window unit going in other parts of the house, so this one is not cooling on its own. It does cool the room its in which is 14x20 and it does a really good job. I dont think that if I had this one going all on its own that it would be able to cool much of a house, at least not in Texas. I put this unit on by itself and while it did keep that one room nice and cool, the other parts of the house really heated up. It also ran the compressor without cutting off. Now when I have them all going the compressor goes on and off, which is good. One thing I do not like about these portable units, from what I have found, most of them the fan will run 24/7 and does not cut off with the compressor. I wish it did but its OK because this is not my primary unit. It has a really nice display on the front thats easy to read, and after like a minute if you dont touch anymore buttons, it will turn the backlight off so its dark while you sleep. I like that part. We have learned that the button in the middle of the remote is the fan speed button, so if you wake up in the middle of the night you can tap that one button to light up the display if you need to, and you wont mess up your modes, or turn the unit off by accident. This one does blow a lot of air for a portable unit too, and thats one reason why I picked this one. It has one of the highest CFM's at 265 which is a lot for a portable unit. I've read a lot of people say this one is loud. I dont really think its much louder than any other a/c unit, but you do have to remember that instead of half of the unit hanging out your window, 100% is sitting in the floor inside your house. Now once I wrapped the hoses that seemed to calm things down a bit, and then I got a really thick bath mat and laid it on top of the carpet, and then sat this unit on top of that, so it has a soft area to sit on, and that seemed to really help a lot too. This unit does have wheels but its HUGE really it is. It is very heavy but rolls around nicely. I think its around 90 pounds out of the box. It does have a lot of cooling power though for a portable a/c unit. I do recommend this unit, but only if youre just trying to supplement what cooling you do have already. I dont really think you could use this unit alone unless your place is really small. It will cool down a good size room on its own though, I just dont think it could cool a whole house like a window unit can. It seems really well built, but you know all of these portable ones are mostly plastic on the outside. It does seem very sturdy though and looks really nice sitting there. If you are a handyman type person, you might wanna try to dual hose thing and get some more cooling power out if it. I do think its worth the money I spent for it, because it works well for what I needed it to do. I had to help the UPS man get it out of his truck and bring it in. I actually offered because I didnt want it to get damaged. It was packed really well and wasnt damaged at all. I've been really happy with it. I dont know why they dont offer this with a dual hose, but its nice to know you can make one out of it if you want. I also added on the top vent some pieces of thin plastic that I was able to cut and shape with some scissors, and I used foil tape to seal all around it. I was able to seal all those openings around the top discharge vent as well, so its more of a stronger directional air flow coming out of the top of the unit. You can really feel it standing on the other side of the room now. Before it seemed to be going all different directions. Hope maybe some people can use these little tips and tricks to get more out of one of these.Update July 19th, 2017This a/c unit is still going strong!! It has really worked out well the past couple of years. We have really enjoyed having this extra unit in our home and has worked so well. The addition of the 2nd intake hose has really made a huge difference in its efficiency, and kept the electric bill nice and low during the hot Texas summer months. We are having 100+ temps now, starting to go into August soon. Looking forward to having my little extra powerhouse to keep things cooled down. I've heard a lot of people say the quality isnt good, but so far I've had no issues at all with this one. Still looks as new as the day I unpacked it.