Me? I just think they look WAY better, and the fact that they're kinder to my knives is simply a plus.
But they're a TON of work - in some cases - the amount of work is quadrupled. That's why they're so damn expensive. See - with a traditional board - you glue it up
End grain boards are a whole different beast.
It starts with scrap.
Lots of it.
You'll need more scrap than you could ever dream about, if you want to make a lot of these boards.