This suction cup performs exactly as expected. It is about 5cm across and made from a soft, pliable plastic. It forms a good seal on a variety of surfaces: glass, plastic, wood, plaster; as long as they're clean and smooth, it sticks pretty darn well. It's well made and shows no signs of wear even though I have a tendency not to treat it properly.

It is compatible with all Vac-u-lock items - dildos, probes, vibrators, etc. It can even be used to turn many models of strap-on harness into vac-u-loc compatible harnesses. Granted, there are items more specifically made for that and not all harnesses will allow for it, but it should be noted that this is another use for it

I use it most commonly in the shower with "the G vac-u-lock" (DJ011010) which is a pretty heavy silicone toy. It sticks to the wall of my shower with only a little bit of droop from the weight. It has never fallen off the shower walls (plastic) or door (glass,) even when I have bumped it hard. It gives ample resistance and sliding along these surfaces is minimal, allowing me to focus on getting the toy into myself instead of holding it up in the proper place to keep it from slipping. That said, it can be slid around a bit if intended, and the suction can easily be broken by pulling on a small tab on one edge.

It's easy to clean with just soap and water, and though it doesn't include "powder," you can just use corn starch. It's exactly the same thing. If it gets stuck in whatever toy, you can get it out by adding a little water-based lube; though if your toy has a tolerance for it, an oil-based substance would probably do just as well or better.

It still works as well as it did 2 months ago, so nothing to complain about there. I would still recommend this item, especially given the price drop.