We (2 adults and 2 kids of 1 and 3) had a great time. The apartment is really big, and by blocking the upper stairs with a big mattress even the one year old could run an play safe. In the lower space, we just kept the doors to the stair closed.
A nice playground is just 5 mins away. And we had kids toys in the accommodation! Definitely recommend, and hope we can come again.