They seem to work as intended. The only problems I can see involve flexible glass in big windows if the gap between sliders is large. If you pull hard on the slider with the star in the middle of the glass, it can flex quite a bit and if the gap is large enough, it could squeeze past it. Using the star at the top or bottom edge of the window would minimize this however.

Clean windows help ensure a good stick. My roommates window now has one, as does the spare room where the cats do their business. I like em.

I also have a fan in a downstairs window that I like to keep open, and both the inner and outer windows slide. This will make me feel better about leaving it open for that. The others are for my mom.

Nope, it just means that the sliding door slides to the outside of the fixed door. You can still mount the starfish on the inside.

The sliding door at my mother’s house opens like this, we could never figure out why anybody would want the sliding door on the outside, unless it has something to do with a screen door.

Judging by the visuals, I’d say that pushing harder wouldn’t help at all. Each one of the legs is an angled wedge (much like a door stop) so the harder you push on the door, the more friction you are creating between the leg and the frame and the harder the seal.

~Kevin

However, it’d be nice to have more than just the ad copy - has the toolmonger tried these? How well do the suctions hold? Would the security features be easily compromised by simply pushing harder on the sliding door?