We had a good trip on the Navigator. It was a spring break cruise and loaded with kids -- from college students down to young children. We were told there were over 800 kids on the ship.
The ship itself is quite nice - certainly the best ship in the industry for a trip of less than 7 days. Typically the ships that cater to the 3-5 day market are older and don't have the bells & whistles of a ship like the Navigator. It was nice to have the ice rink, the upgraded mini golf, the inline skating, Johnny Rockets, 2 speciality restaurants, the Royal Promenade shops and bars, etc. The ship was also in good condition. The staterooms might be a bit tired (it was launched in 2002) but I think the public rooms are generally good. There are areas that could surely use some sprucing up but in general it is in good shape.
The food was good. We found the food in the dining room to be better than the Windjammer but I think most people feel that way. The Windjammer and Jade did have a great variety of foods - from typical American fare to Indian, Chinese, Italian, etc. But based on the massive quantities that they serve they do an excellent job. The Dining room was also very good and a step up from the Windjammer. The portions in the dining room are very reasonable. I think if we had all of our meals in the Dining room instead of at the buffet, we would have eaten better and much less. The service in the dining room was excellent the first 3 nights and then slow the last 2 nights. I think it took 20 minutes to even take our orders the last 2 nights. But we weren't in a big rush to it wasn't a problem. I would say the dinners took 2 full hours. We did go to the Windjammer one night for dinner and they had the exact same food as in the dining room only buffet style. Jade has a nice selection of sushi and that was very popular.