Sovata is one of the resorts in Romania that I love very much, and I went to Ursu Lake and got into the water, even though I can't swim at all I was able to float for minutes on the lake without much effort.
We also visited the resort with that tourist train(I even saw it in one of your pictures), which was a nice experience.
The time spent in the resort was superlative, beautiful places, nice people, in general a holiday vibe.
I didn't mention anything about the food because the food is very good and needs no description, I ate in several places and it was perfect.