I`am using that mod allready. And its great. x1.5 mode.
The only thing i dont like is that the big waves come to close to each other.
The sub doesn`t "ride" the waves when they come so close. Instead the sub , when its on its way down from one wave, another hit the sub and make the sub submerged.
In real you never se big waves come so close to each other.
There is a large gap between them so the sub acutaly ride them like a rollercoaster
To bad there isnt any mod that simulate that. would be more realistic