We did not have reservations but ate a late lunch there. I’m not sure about dinner, but it was a great, casual place to eat in the Poipu Beach area during the day. It is owned by the same person who owns Duke's Canoe Club. The restaurant is open, so if it is cool, bring a sweater. I read some reviews that said it was facing the street and wasn't so nice. The street it faces is not a busy street and therefore not a problem for us. They have many plants, bushes, and trees around, so you don't really notice the street there.
Our late lunch/early dinner for two (appetizer, sandwiches, and sodas), including tax and tip, was $30.