We have 5 cats so you can understand that our house is swimming in fur. We have tried it on sofas, beds, pillows, and carpets and it is FANTASTIC.

You can see in the video that compared to how much fur the cover that the cats sit on every day all day had collected, it did not require much effort.

We have had it for a month. We tried it on carpets, sofas, blankets, car seats, and pet car seat covers. It leaves no trace of hair. We had an issue because our dog (an Aussie Border Collie) sheds a lot of hair, especially in the spring when it changes its coat. Removing them became very easy. It is a quality construction (made in Germany) with Karcher standards. It fits (diameter) almost all commercial nozzles (35mm). It is a bit noisier than regular vacuum cleaner attachments, but it is insignificant compared to its effectiveness. It is worth the money.
Update (17/8): After 5 months of use, I have one thing to say: we were saved.