This game has great trailers, it does look amazing.
What it does fail to deliver is a good game, it plain sucks.
The damage model of the ships is super basic, it clips through whatever you crash into, there's no visible damage.
You can walk on your boat, a great feature, but you can't jump, you can't open doors, those few boats that do allow for moving around on them usually have closed doors that you just walk through, like a ghost.
When a ship sinks, the water just clips through everything, I realize this is not really an easy thing to code, but it's as if you played GTA vice city, perhaps that looks beter still.
When a boat is going fast through the water, the water does look extremely good, but the disturbed water "animation" slows down" when you go slower, doesn't look good when you know that.
I can barely play this at all anyway, I have a pretty beast game PC, (60FPS in most games) but here I can barely scrape 20 at times, due to the fact that the developer has not patched the issue of AMD videocards not really being optimized for this game.
If you have an NVIDIA videocard, you'll not have this issue, if you have an AMD card, don't bother buying this game, it'll not run playable.
Good game? The idea is good, but it's poorly performed.