What This Means
The structure is narrow. All 175 sailings are Interior - GTY, so there is no cabin spread at all. Regionally, the tier is mostly Caribbean and Mexico, with only a small Alaska presence and one Bermuda sailing. That makes it useful as an entry point, but not as a value destination.
This is also the tier where the certificate is most clearly about access rather than upside. There is no free play attached here, and the best examples are short-to-mid length sailings from West Coast and Gulf ports. The strongest names are familiar ships like Serenade, Voyager, and Symphony, but the offers themselves are basic compared with the middle and upper tiers.
The good news is that the ladder improves quickly. By 800 points, Balcony - GTY appears. By 1,200 points, Europe becomes practical. By 4,000 points, Alaska and a $500 FreePlay example are on the table. So the 400-point tier is not a dead end, but it is the weakest value band in the release.