The location of Hotel Not Hotel is really good - excellent transport links into the centre via tram, and an easy bike ride too. We got a taxi one night and that was very reasonable as well. The hotel itself looks fantastic and the staff are very friendly and helpful. Made good local food recommendations and got us in a good night club! We were under the impression it was a bed and breakfast from this site, and that that was included in the price, but it wasn't. However we bought a breakfast on one morning and it was very good value for money (€9 pp).
My friend and I stayed in the Faded Colours room which is quite small but that's not a problem for a weekend break (there is enough room at the end of the beds to change etc and there is under bed storage for luggage). However it is VERY hot, even with the fan on (which is loud but didn't really disturb our sleep). So bear that in mind! The communal bathrooms are great - spacious and clean. I would definitely recommend this hotel as a friendly and convenient place to stay, and a beautiful environment.