We had dinner last week at the Preservation Kitchen with our extended family of 6 people. It was a week night and the restaurant was not busy, so service was great. As other reviewers have noted, this restaurant is housed in an old house. If memory serves me, it was a popular French restaurant many years ago. Between the 6 of us, our entrees were salmon, duck and chicken cordon bleu. All were prepared and presented very well.
The salmon was moist and fresh (this restaurant uses local suppliers) served on a bed of rice and corn. I sampled the chicken cordon bleu and it was also very moist and mild flavored. My son had the duck and said it was the best he had ever had (although his experience is limited). Our desserts were also great - try the bread pudding with vanilla ice cream.
The biggest negative experience was their men's restroom was small and very outdated. Plus one of the fixtures was "out of service". Also, we sat in the "cafe" next to the bar and the music from the bar was too loud, although when I complained they turned down the volume.
Overall this is a good choice for families. Its neither inexpensive nor expensive (given the high quality of the food). I'd say it is a 3+ to 4 star restaurant.