The staff is excellent, the beds are comfortable, and the food is pretty good. There is a giant slide in the front area and I actually got to sit and have a coffee in peace while the kids ran up and down the slide for an hour. It was worth the stay alone, haha. If you're going to the Liseberg Amusement Park, you can't get a better location.
I highly recommend leaving the hotel, though, and going to Haga, a little town that is about a 20-30 minute walk from the hotel. It has the best food and cobblestone walkways.