We stayed for 4 nights and booked initially only with breakfast.
Overall: Most of the staff was nice. Our main reason to come - the Spa - was relaxing, even though you cannot expect to relax here during the "opening hours" for families with small children (?Before 11am? and between 15.30-17.30)
Food: Breakfast was good! On the other hand, we cannot recommend dinner at all! We tried dinner only once (a la carte) - it was very noisy in the evening (felt like a Club Resort Hotel) and the food (Caesar Salad had very dry chicken - Staff did not handle complaint very well) was not worth its price. We would rather recommend you to have dinner outside of the hotel (e.g. Hunnebostrand or !Fjällbacka!). Moreover, cheap and good quality lunch can be found at Nordens Ark (combine it with the zoo!).
Spa: Morning activities offered by the Spa (Yoga/Outdoor Activities) were very nice! Information about spa/breakfast/... was only available in Swedish. In the Sauna, people can be seen sitting in their bathing shorts without towels to cover the wooden benches, sometimes drinking tea or eating fruit! Consequently, all of the Saunas smelt like synthetics and were not pleasant to use.
Room: Standard rooms, nice beds and no noises! Only unpleasant experience was, that we discovered some insects (centipede) twice in the bathroom!
Other facilities: Vann has an outdoor fitness park, tennis courts, billiard and table tennis, and much more - If you want to stay all day in the hotel, you probably can!