I've been using these foam tape squares for everything from hanging posters to securing small shelves, and they haven't let me down yet. The adhesive is seriously strong - my gallery wall hasn't budged an inch, even with my cat's occasional 'inspections'.
What I love most is how easy they are to use. The perforated sheets make separating them a breeze, and the backing peels off without any frustrating residue. Pro tip: only peel one side first so you can press firmly against the surface - it makes all the difference in getting that secure hold.
They're perfect for renters like me who can't drill holes. I recently used them to mount a small mirror in my bathroom, and three months later it's still holding strong despite the humidity. Just be mindful on painted walls - test a small area first if you think you might want to move things later.
The 300-count means I always have spares for last-minute decorating ideas. Currently planning to use them for some 3D wall art in my craft room - they're sturdy enough to hold layered pieces but won't damage the walls when I inevitably change my mind about the design!