The suction cups did keep it on the counter top ...
933070
The suction cups did keep it on the counter top.  I tried a golden beet (less staining) and it worked well.  Zucchini pasta is next!
3845067
It didn't come with suction cups. Not sure if that's normal, but very misleading!
1322451
I really like the idea of this product, and it's almost great, but it was delivered with only two suction cups. The two hold the weight of the shelf and shampoo bottles just fine, but without a 3rd to anchor it the shelf tips back and forth.
1166535
Didn't like that it's suction cup and not where a can hang it. I use it as a towel holder in my bathroom, I just used hairspray and suctioned it to the corner of the counter and it works fine
2798102
Am I doing this wrong? I tried to hang one of the bags above my bathroom sink, on the tile splashback below the vanity mirror, but the suction cups don't stick. I tried moistening them with a little water, but they still won't stay up. The bags are nice, kind of a rubberized mesh that should hold up pretty well. It's a nice organizer for your dental floss and assorted small vanity items. Probably would need to buy suction cups elsewhere, 'though, to keep it from falling down.
1697106
This looked great and I was excited to take some counter space back by having the sponge in the sink. Unfortunately it the suction cups didn't hold the weight of the basket. I tried many times, in different areas of my sink, and it never stayed put for more than 30 seconds. I have a stainless steel sink. Perhaps porcelain would work but I'm not sure.
2979555
It's fine, does the trick. However, I am not using the suction cups, so I can't attest to how well they stick.
1882344
This is great except for the suction cups which curled and would not adhere to the wall after only several weeks. We had to buy replacement suction cups (inexpensive). If the suction cups worked well, this would be a 5.
3797062
The suction cups don't want to stay "stuck" to to SUP. We still have to use small bungee cords.
3622772
It looks good and seems sturdy. The suction cup doesn't want to stay put but that could be the tile in our shower.
2180503
Works great. I was surprised the suction cups work as well as they do.
3781433
The small suction cup that is supposed to stick to the wall of the shower does not work. It falls off no matter what type of surface I put it on. It does work to stop the tub and use it as a bath but it would be nice if it would stay on the wall
3172672
Overall, the construction of the perch seems solid and looks like it would make a good shower perch, if it would stay on anything.  I even went so far as to wash the suction cups and both tile and glass with isopropyl and apply Vaseline to the cups as the instructions said and all I have to show are some smears in my shower and on my mirror and no usable perch.  I'm going to look into getting some replacement suction cups, but I feel the ones included should be able to do their job.
4790447
The suction cups really work but not so much that it can't be moved.  Holds 2 regular sized sponges plus a scrubber.  Keeps everything off the sink.  Would highly recommend.
1958482
I took the little suction cups off, turned it over to stand it up, and it holds more sponges. The are always DRY in the morning
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4825826
The suction cups only work on a PERFECTLY SMOOTH surface. If your shower wall has even the slightest texture to it (as mine does), the cups won't adhere and the caddy swings back and forth freely.
2455769
The caddy has two suctions cups on either side to hold the caddy in place.  When I recieved the caddy, one suction cups didn't work.  Like it was too flat to create suction or the plastic was too hard.  I even tried to fix it by replacing it with a spare one I just happened to have.  It didn't fit well no matter what I tried.  I still use it the caddy however.  The weight of the sponge holds it down fine without the suction cup.