We are family of four with two small kids (4and 6) we have stayed in their separate apartment- it has two rooms and great living space. Flat/ apartment was very comfortable and had all we needed , you are in the heart of Rovaniemi and everything is close from the food stores to restaurants and any travel agency for day trips. We have use BeyondArctic (they had a discount if you stay in hostel).
Our breakfast was included and it’s plenty of choice (all continental) , but what was the best that we could have a hot buffet lunch after all our morning trips at the hostel (ps is very popular with locals and gets very busy , so sometimes you have to wait for a table , but most people are here on their break and don’t take long). Buffet was different every day and we found things for our kids and us , meaning we could just relax (kids eats free!!!)
Overall great place , friendly staff , amazing location and we were often just hanging out on the swings inside the restaurant/reception while kids were playing in a little play area with lots of toys.