it works fine. only works on a flat solid surfaces only
580068
it works fine .only works on a flat solid surfaces only. worth for the price I paid
3554963
Works on most products, not best on glass or smooth surfaces.
4900330
Love it.  Holds great on flat surfaces.  I don't think it will work very well on multiple curves.  I have moved it once using the replacement kit that is available.
85266
Save your money. They claim it will stick to any surface. But it does not work on any surface and didn't work from day one.
766870
works great on hard surfaces, a bit tricky on carpet, does not raise up far enough even on short nap. bogs down even though it is set on highest setting
2867273
Performs as described however it is very small with a small brush and the head does not swivel so it doesn't clean the whole pool completely and is awkward to use. It works fine on a flat horizontal surface but not really too well on any thing else. If it was larger with a larger brush and swiveled it would be ideal.
2787861
It works fine if you're using this unit with a 'true angle tool' on a flat surface like a drawing board. If you take this to the field and try ro measure say a roof angle with it, forget it. Maybe the Mfgr. or Amazon should explain the proper use of this tool.
1273906
Works great if your CD slot is on a flat surface. It worked in my car, but in my wife's 2013 Ford Escape it did not fit. The CD slot in her car is on an angled surface and it prevented the mount to fit properly.
2563849
Only one BIG problem for me. The picture shows Grills on the bottom side of the fans, which didn't come with mine. This makes it only good for flat solid surfaces. Exposed rotating fans make it not good for laps or other surfaces that will come in contact with them. It really should have removable and cleanable filters on the bottom/suction side.
644873
This is an interesting idea, as it attaches with friction instead of suction or glue.  It does seem to work, though, and seems pretty sturdy.  It does have to go on a smooth, shiny, completely flat surface.  I installed it on my shower wall right outside the door.  This is a glass surface, and it seems to adhere well.  I am hanging a towel on it while I am in the shower so it is handy when I open the door.  The other towel bars are not reachable without leaving the shower.  It works well for this and let me put a hook in a place that would have been difficult otherwise.  I took off a star because the demand for a smooth, shiny surface limits where you can put this up.
4509937
Works best on flat surfaces.  Large size rubber stamp covers the average magazine or address label with one stamp.
Takes some time to dry on glossy paper so don't touch the ink until it's completely dry.
1836681
For some uses it's great and 5-stars... for other's it is useless and gets a 1-to-2-stars. What kind of surface are you using it on has everything to do with its effectiveness.

+ Great for completely smooth surfaces (plastic container, polyeurothaned wood, etc.) I used this on a wooden desk that has a thin polyeurothane finish. It works like a champ.

- TERRIBLE for painted surfaces with ANY texture of any kind- even subtle wood grain. I have sanded and painted magazine boxes I got from IKEA that I sanded again myself prior to painting in order to ensure a smooth surface. Though completely smooth to the touch, apparently even the slightest texture seems to have this chalkboard paint lift from it. I have it on a plastic box that I painted with the same paint, and that hasn't lifted at all. They were painted at the same time and labeled two weeks later with the tape. It's not the paint :) which was my first guess. It's working like a champ on the plastic surface that is painted.
609355
Pros: Great for flat surfaces, hard plastic surfaces, glass, and those dots on your windshield behind the rear view mirror that are suppose to help ease sunlight. And the fact it's reusable.

Cons: I couldn't get it to work perfectly off or a curved, soft "pleather" dash. More details below.

I couldn't get it to work on my curved dashboard. I daily drive a 2013 Nissan Sentra. The dash is very curved. Either the the sticky gel pad would stay or my phone mount would fall off. If I got the phone mount to stay on the pad, the pad would fall off. I'm from Northern CA Bay Area and my car is black. I don't believe heat to be an issue. I've cleaned the dash different ways and making sure nothing would cause no problem of the pad adhering. As far as after I have used cleaning material, used a keyboard cleaning compressed air, and a microfiber to make sure it's spotless and actually dry with no oily surface. And same for the iOttie pad which wants you to use warm water only and an air dry to clean and renew the pad.  And being from the Bay Area I had an abundance of different sized suction cups. Nope, couldn't get it to work on a soft "pleather" curved dash. Which was the only reason I wanted it for.
19933
I purchased this item to spray the underside of my woodworking machines. Over use, I find that sawdust sometimes clings to machine and eventually compacts in place, making it difficult to remove. I was hoping that this would provide a thin film that would allow the sawdust to fall off easily. For this purpose, it works marginally well. The spray is essentially a spray on wax. It is liquid when sprayed on and then dries quickly so it no longer drips. It takes a few hours before you can touch it and not have it stick to your fingers. When dry, it feels like a thin layer of wax that can be easily removed with any pressure. Maybe it will become hard after a few days, but I did not test that. I still use it, but only for irregular surfaces. For flat surfaces, I find that a car wax (that I can buff and make really shiny) works better in creating a slippery surface. And the car was shine can be accomplished in minutes rather than hours.
1342071
Worked only on my windshield - NOT my dash. BUT YEAH - it works great to grip and bend.
1389644
It's a flat surface. Chair wheels roll on it. Not much more can be said. It works. I dropped it a star because it needs to have a version that's wider without also being longer.
1321063
Basically works on flat level ground.  Really rough travel over gravel or uneven surfaces.  Will not take a full weight load up inclines without tripping the circuit breaker.  Still not a bad product for getting around on sidewalks or asphalt.