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Needed to cool down my 1000sqft abode, and the portable AC unit I had wasn't cutting it. Really pleased with how quiet system is, and so far, how capable and efficient it is. Was long overdue. My Electric bill fell by almost 35% overnight. Just a few things I noted while hooking it up. The control line cables seem a tad short relative to copper line sets. I hooked up copper lines first, and then installed the control lines, only to find I was short. I think they need to add a couple of feet to control lines because control lines have a slightly longer distance to travel. Moot point for me, as I went with Teck cable...cable needs to be mechanically protected outside. Note: I think all fans are DC powered. The drain line on compressor unit - not enough clearance, even with with rubber feet. I had to shim unit so drain elbow could be installed. I'd make feet a little more prouder. Would be nice to state clearly and in manual what unit is precharged with. Noticed on placard on outdoor copper line set cover at compressor unit, it was precharged for 49' of copper line (I have dual head unit). Placard also mentions to vacuum only 'one' line. I have two line sets...both line sets should be vacuumed. Power terminals at compressor unit are undersized, not for control lines, but for power line. Had a bear of a time getting power line securely hooked up to little terminals. Was thinking it would be nice to have the option to have one remote able to control both head units... I purchased a vacuum pump, and vacuumed both line sets. Got the /gp/product/B07MZ5T96H Should note I used plenty of Nylog where copper lines mate. My install wasn't particularly easy. You can see I chose not to mount on wall, and I had to drill through concrete wall to run power, control lines and copper line sets. Also, had to patch lines together because I had one longish run (cutting and flaring ends). Water drain lines are not supplied (cheap to order)...I piped mine to HWT drain. Disappointed I cannot get a warranty for a DIY install. Nothing terribly complicated about install, just requires one to understand what they are doing, especially on vacuuming lines and pressure testing them. Did have a mix-up on order, in that their website had wrong info for accessory (since fixed). Resolved quickly! Have to say, I wonder why I didn't get this unit years ago. It isn't like normal AC units. I don't get the noise, AC smell, or bad air smell. I get whisper quiet flow of cool or warm air. In mornings, I am a bit chilly, problem solved (heats well). At bed time, I set unit to 62F, and within minutes, I am in la la land. Split air heat pump doesn't suck in outside air, so it isn't bringing in outside pollutants, nor defeating itself trying to cool the warm air it sucks in from outside like a portable AC or window AC unit. And yes, you can turn off LEDs on head units, so you have no annoying lights at night. The only sort of annoying thing, is the head units are a tad bulky, but there isn't much one can do, as the head units need a sizable coil and fan. Again, so far, very pleased with unit. Thank you!