Just returned from our 3rd stay here.
Great location: near to a few good spas Very friendly staff. The rooms are adequate although can be a little cold. Situated within 100m of the new 'aqua park' which is great for adults and children alike.
The only draw back- like most restaurants in Lithuania- is the vegetarian option. These are really poor. I was offered tomato ketchup and spaghetti as an alternative to the aubergine which has been resident on the menu for > 2 years!

This being said though it is a really nice place to stay and unwind and would recommend it to anyone visiting Druskininkai.