The bed wasn't the comfiest and we especially disliked the coushins which were too soft but nothing unbearable and we still managed to have a good night sleep.
We stayed here for only one night but here are our insights.
Excellent location, everything worth seeing or doing in Zagreb at arms length, the whole concept of club/bar/hostel all in one is very fresh and well thought of having the location in mind.
The interior is very well decorated, we stayed in a double bed room with private bathroom, we were pleasantly surprised by its size, especially with the size of the bathroom. Also there is a free TV in the room and a fridge and we've definitely had a feeling of staying in a hotel, not hoStel. The room was clean.
Also, the night was pretty quiet although the club is in the hostels seller, you can only remotely hear the bass but nothing that can interrupt your sleep.
Having all of this in mind, and the price of cca.49 euros per night, Taban is an excellent choice, even for people that usually stay in hotels.