This place has just opened up. It's a very clean and cool place. As you walk in there is a cafe on your right, serving tea, coffee, orange juices, yogurts and sweets/cakes. Then you walk through to the 'library' where there are around 6 cats sleeping and roaming around.
The cats are very friendly and love being petted. It is very calm, quite and peaceful.
I went on the opening day, so they didn't charge anything, but I believe it costs 3 euros, but if you spend 5 euros on drinks/snacks, then you get to go in and play with the cats for free. This place also has wifi, so you can come and sit and work while the cat walk around!
Overall, very cool place. The only reason it got 4 is that for the space, there are IMO too few cats. This could be due to the new-ness of the place tho. I would go back!