We stayed at Helenas for 2 nights. The balcony and the view are amazing and we spent a lot more time at the apartment then we initially planned to, just because it is such a great location. The apartment is cute, but has everything you need. The living area/bedroom is decorated very nicely and it felt very comfortable and home-like. There is a large fridge-freezer-combo and a nicely fitted kitchen. The bathroom has a tub with no shower curtain, the bathtub faucet is a little fidgety, but the view from the shower is awesome.
All in all the apartment is a hidden gem. The next tram stop is two minutes away, and we got to and from the city withing about 15 minutes, even at night. The apartment is on the fifth floor, but there is an elevator.
We would definitely stay here again, should the opportunity arise.