i don't really like the new 15400.
The reason is simple and the photo depicts my mood.
The first time i saw it i thought it was a fake: no ratio between the caliber and case, looking at the back is a pain for my heart.
It's one of those watches i call ring cakes
The new chrono suffers from the same illness, obesity.
i'd suggest you to look for the old reference, 25860ST, it's even cheaper.