Does not stick after 95 degrees
341648
This stuff is terrible - Once the temperature gets above 95 degrees the glue breaks down and the patch comes off. It has cost me 100's of dollars in water bills because the patch adheres for a couple weeks and then when the temp gets over 95 it just slides right off - would NOT buy it!!
403687
Same thing that happened with a lot of people that put their reviews here, happened to me. It's cold outside and the shades don't stick at all. I wish they could explain that better on the descriptions. I'm keeping it to see if will work on the summer
3665027
Works great until summer comes!  The adhesive just can't handle how hot it gets in cars in summer - there's no way to order replacement adhesive once the two stickers it comes with wear off, and after a week or so of >90 temperatures, the adhesive fell off while I was driving.  So has the second adhesive sticker, even though the dash ball is mounted right near one of my vents.  If it were more durable I'd love it, but as is, it's not meant for people who live anywhere that gets hot in summer.
3698042
Keeps failing off in the summer heat.  I prepped the surface with rubbing alcohol and heated the adhesive with a hair drier first.  It's only holding a Access Port which weighs next to nothing.
1931222
Does what it is supposed to do. But it is NOT recommended for hot climates. I had to throw mine out as it got extremely sticky!
858390
No change in pool temp over 5 70 degree days.  Worst $100 I ever spent.  Save your money.
56441
I thought this was a good purchase, easy to read color display. But after a couple of months we're now into the hot summer months, and the outside temp is way off. It 's the 90's, but the thermometer displays high 50's to low 60's. Not even close! Maybe this will be a good thermometer for just 10 months of the year?
4461465
After having for over a year the suction cup melted on a hot day and now not will not stick to my windshield.  Didn't come with any instructions so I didn't know that I could leave it attached to the windshield when it was over 90 degrees.  Oh well, live and learn.
3560494
The mat does not lay flat and it is too hot. I laid a thermometer on it and the temperature got up to 96.
1828032
Well it worked great for about 2 months, even though the thermostat was about 2 degrees off. 4 months in and the thermostat is turned as low as it will go and it keeps it 80 degrees. It's definitely not worth it. Also...When we installed the suction cups past the top 3 inches of the top of the heater the heater consistently made a clicking noise until I moved them.
1685710
Should have listened to the reviews.  It is currently 15 degrees in Maryland and this gem says it is 55 F.  It has been sitting idle in my garage for 3 days so it has had plenty of time to adjust and acclimatize.  Wish I hadn't thrown out the box.
4223320
Follwed directions exactly. But temp outside was in the  mid 70's and it caused the tape to stick without pressure. So resetting and adjusting  was a nightmere.  Ruined almost whole  roll before throwing it out.
4298505
I've had 3 of these and they all get stuck at 90 degrees.  Never, ever buy this again.
1720754
To the people that cold not get the glue off, try your hair dryer.  After heating anything with glue on it, stickers labels, etc. it usually just slides right off.
2298148
I should have listened to what others had said about regulating the temperature.  I received this yesterday, today I plugged in the propane so I could burn off any residue on the burner.  It got up to 700 degrees with no problem but when I turned it to Low it would not go below 400 degrees and I'll be darned if I'll go through contortions to make it work.

Yep, it's going back NOW!!
1510332
We live in Texas and the glue just cannot stand up to the heat here. We've lost both already and had these less than 4 months, and it's been a cool year here in Houston. The glue is just too weak.
1361724
works great but under summer heat it won't hold up . The plastic where it meets the plastic suction cup got warped from the summer heat. now it won't connect to the window at all . I bought 3 of these for my cars . so far one went defective....