Not particularly authentic (I have lived in Japan) and some of the sashimi was not particularly fresh, and the kare-age (deep fried chicken) was quite tough. Thus, although it's not particularly expensive, I would say it's not good value for money. There's a Japanese-language menu so at least some of the staff must be Japanese-speaking so I would have expected better.
The service was OK (efficient but not friendly) - and again not up to true Japanese standards.
Probably OK if you want something different to typical American food, but this is not a proper Japanese restaurant.
If you own or manage Sushi Sam's Edomata, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.