I purchased two of these. The first one worked so well that I wanted to have another one on hand for decanting my personal perfume bottles. The second set I purchased is defective. The tube-like attachment doesn't work to suck the perfume out of the bottle, but the attachment to put perfume back into the bottle works, just it doesn't work as well as the first unit I bought. I think there is also an issue with the syringe maybe not being airtight or giving proper suction. When I look closely at the tiny tube attachment in this new set (the one used for sucking perfume OUT of the bottle), I can see that the hole is almost microscopic which is why it isn't pulling any perfume out of the bottle, nothing can get through. When I go back to using the old set, it works perfectly on the same perfume bottle. So yes this product is great when it works but they have some defective products. If you get a product that doesn't work, I would recommend ordering again until you get one that works. The working product is wonderful and works amazingly. They just need better quality control.