We ate here whilst staying at the Mabre Residence, which operates the restaurant. As it was a beautiful spring evening, we chose to eat outside, which was enjoyable until the staff decided to park and unload/reload a van next to our table - for half an hour.
The food was very good but the choice was limited, and the portion sizes were huge. We shared a dish and were perfectly satisfied; neither of us could have managed the whole portion on our own. Dining with children could be a problem, although I'm sure something could be arranged as the staff were very helpful and spoke excellent English.
There was a good choice of wine and although the wine list had some items with incredible (for Lithuania) prices, the house red and the house white were affordable and good quality.
In the context of Vilnius I don't think the prices would have been justified unless we shared a dish.