The only negative point first: The outer carton is a bit unstable, the first time she fell apart almost as I took it from the shipping container, the second time it went that way. But well, this is only secondary.
The yellow sticker with me functioned properly in any case. I had we mentioned an extremely large infestation at the plant and have the same 4 Sticker reingesteckt. After a few days were almost completely full and were again replaced. After a while it looked like the fungus gnats were finally defeated, but they came right back, so the yellow stickers are still a permanent resident in my plant.
There are plenty of metal rods at aufzustecken to the sticker. By the punched hole could they even hang up.
I welcome also the price / performance ratio, unlike other yellow tickers that are offered here. With 15 stickers to get by for a while.
And since the whole organic and without insecticides is, I'm not so much worried when I touch it once. I can also confirm that they do not stay too much stick to your fingers, making them easy to handle.