This thing gets stuck on just about every rounded wall ...
340095
This thing gets stuck on just about every rounded wall in my pool.  The roller parts were broken out of the box and I had to replace them myself.  Then it ripped a hole in my pool because it got stuck on a wall.  Save your money and buy a pool cleaner that works.
1746033
Couldn't get it to stay on the wall because the back part is curved rather than flat. Maybe it's possible with a nail or screw, but it wouldn't stay on with 3M strips.
734610
I am not sure if it is just my case but nothing really moves around its all pretty much stuck in one corner :(
322225
Gets stuck in a corner a lot, or even up against a flat wall.  Also the skirt comes off frequently.  Should probably have spent more and gotten the good one.
2362874
This gets stuck on everything. The bathroom scale, the base of the fan, the gap in the kitchen throw rug. I come home and play hide and seek with the vacuum. And it hasn't vacuumed anything. I say don't buy it unless you plan on vacuuming a solid floor with no gaps. It's not working for me. And it won't dock with the recharger. You have to put it back manually. Don't buy.
2478296
It always fall from the wall. I can never let it still on the wall.
1237272
Does not stay attached to the wall. I have it fixed to a flat tile surface and it says for a little while and then the rubber ring comes apart from the metal circle and it comes crashing down. Waste of money.
2253991
Nice, but will not stick to the wall. I eventually threw it away
1408463
This thing is still attached tonmybcar bc the sticky is so strong it won't let go. And it doesn't work, at all. It never did. It just sporadically works which kinda DEFEATS THE PURPOSE.
352989
Horrible corner shower caddy / shelf.  No matter the silicone applied or Extreme Duty 3M tape (20lb cap.), this thing just kept falling off of the walls.  I have 3 Simplehuman dispensers on the wall holidng close to 32oz and thing thing can't keep up.

Falls, sucks, poor design execution.
2775608
Looks nice, but the damn thing won't stand up on anything less than a perfectly flat surface.
85494
The adhesive always gets stuck on my wheels and the corners eventually bend and I have to cut them off
3945129
Looks great when it decides to stick to the wall. Some of the design sticks but 75 percent of it is coming off the wall and I have to keep pushing it back on the wall just for it to keep starting to peel. I bought another one cause I thought maybe it was just the one but the second one is doing the same exact thing.
3679452
Doesn't have a good turn radius and when it does get stuck and I pull on it the plastic pieces pulled right off
1719416
It doesn't adhere as it is supposed to and that makes it almost impossible to use
2787045
Always gets stuck won't open right or close right.
2444597
If you want to hang a single frame that is level, this will get the job done.  It will be frustrating for a couple of reasons, but it will get the job done.  If you are trying to hang your frame level and in reference to ANYTHING (distance from a wall or door casing, distance from the floor, distance from another frame, LEVEL with ANOTHER FRAME) THIS THING IS COMPLETE GARBAGE!!

1.  The gradations are on the WRONG side when you are holding it up to the wall.

2.  The "flat back" of the instrument, that would be so nice to be able to hold against the wall, with a reference line, CANNOT BE USED because the pins that you need to press into the wall are on the opposite side.

This is a great idea, but this product is not good.

Gradations need to be able to be seen on EACH side of the tool.  Tool needs to be able to be held flat against the wall when making your pins in the wall.  The edges NEED to be flat so they can be flat against the frame when making to reference markings.  All in all this is extremely frustrating to use when hanging multiple frames in reference with one another.  If this is what you want to do, this tool will NOT help you.