Does not keep cool as described.
345582
So very hot using this cover; head and face started sweating within 30 seconds. Returning this product.
3164181
Had this unit for almost one year, but I've only used it about a dozen times, since life is pretty cool in Northern California.  I don't believe this unit has ever really cooled.  Buying a little thermometer now to test what the output air temperature really is. I would love to return it, but didn't keep anyway of repackaging this 80 pound hunk of junk.  Very disappointed  would not recommend to anyone.
3726250
This pillow may be great for memory foam but sucks at cooling.  it does NOT stay cool.  I have to flip it all the time and sometimes it's not cool on either side!  I HATE this pillow!
468969
Does not get even remotely cool!  What a waste of money and since it is not bought through Amazon Prime but an independent seller, I am sunk!
4938956
I was looking for a mattress pad that would cool me off a bit while sleeping, when I found this Bamboo Mattress Pad.  In looking at the product description and some reviews, I thought this might finally be something that does the job.  Unfortunately, this has not been the case.  In fact, not only does this pad not cool me off, it actually has made me sweat every night since I've owned it...hence my plan to return it today.  If you're looking for a pad that allows for a cooler sleep, and unless you're comparing it to a feather bed or some other hot layer, this is NOT the pad for you.
339933
Very disappointing. really doesn't keep the temperature on what it said (45F). I had a fridge thermometer inside for the whole trip. I had it plugged in in the hotel and when in the car away from sun. The lowest temperature I  got was 50F. You could also feel the beverage were not cool enough.
2282721
Maybe I got a dud but mine does not cool "40-45f below ambient temperature." Basically mine sweats water inside and doesn't chill or frost over, the way other reviews mention. I put a thermometer inside and it was only 25 degrees lower than its surroundings. In my 82 degree apt, the inside of the fridge only got to 57 degrees. I took it to my work place which is kept at 74 degrees. It didn't sweat as much as it did at home, but it still wasn't chilling, merely cool.  I've tried it with AC, DC and the USB with all the same result. The one I received also came with a rusted DC cord. After several emails, and two different deliveries, I finally received the DC cord along with two more AC cords. I wanted to use this for car camping, but no way would this be safe to put food in. It's okay for a slightly cool drink and that's about it. I did not try the heating ability.

Update: I received a replacement, so in addition to good customer service, my fridge now frosts over the way other reviewers mention.
3520045
I've had evaporative coolers before that worked well in our high desert but this one did not perform as advertised.  It claimed it would cool the room temperature 10-12 degrees but it didn't cool at all.  I wanted to supplement our AC in our den and then wheel it to the bedroom.  I loved the features - remote, timer, etc. but was very disappointed in the product.  I returned it to Amazon - who made the return very easy.
3241165
Pretty disappointed, especially given most recent reviews. I was planning on making my office at work so cold I'd upset my office mate, which in general is easy to do. I was super excited about this thing because he likes the office hot, and I prefer low 70s (18C since I'm Canadian). But this piece of s..t totally blows... In a bad way. You wet a sponge, then air gets forced through it... This isn't real AC... Especially enough to piss off my office mate.

Fail.
2736138
This is a humidifier not a cooling system. The fun works well but it doesn't cool. I tried to return it and they wouldn't take it back after 30 days. Too bad I unwrapped it on the 29th day. Very disappointed.
4843665
It's supposed to keep liquid cold or hot but it's not insulated at all. The outside sweats which is not supposed to happen. It doesn't keep anything cold and the handle is flimsy. I don't know where these five star reviews are coming from. But you get what you paid for.
3130112
Not insulated.  Not even a tiny bit.  It was really really disappointing.

I filled it with boiling water and it was immediately too hot to touch and the water was cool in two hours.
4859820
I purchased this hoping it would work as described.  Although cooler than your "bed temperature" in the first few minutes, after that the material in it gets extremely hot where you end up sweating.  This is NOT what was expected of a cool mat!  It is now unable to even be used, and this is an expensive price for something you can't use.

BEWARE before buying.  This is NOT what you are looking for if you are looking to stay cool throughout the night.
59108
I bought this for an indoor office chair, and the cooling function was for me more important than the heating one. It turns out that while there is a heating element in the cushion, the cooling is not an in-built capability and is only achieved by freezing cold packs in your freezer then inserting them in the chair. The packs and the slots to receive them are provided in the cushion, but obviously, this is not a very practical way to achieve continuous cooling.

The description does not make this shortcoming clear. Because I wanted this cover for cooling rather than heating, I had to return the item.
4584392
The advertisment of "cooling" is very misleading. Although the foam topper is very soft and comfy, it is definitely not any cooler than my previous foam mattress and it gets warm throughout the night. The simple fix was to change my comforter to a lighter quilt so I can sleep on it, but I just think that it's false advertising to say this foam topper is "cooling."
1993750
It was easy to set up; however, it only blows air. Does not cool. Sending it back.
4485533
I am so disappointed with this purchase these units are not as good as window units. They are not quiet they never shut off even when it gets to the temperature you set it on it keeps running. It does not even cool my Living Room which is only  a 12 by 20. Set It for 72 and a few hours later it was 80 in here. I will be returning this unit and going back to window units.