That was just posted on haflingerfriends as well. Not sure if I would be trying it either - even if it did become available over here.
I used to board at a mare's milk facility. Of course they made me try. Not my cup of milk, so to speak, it's thinner than cow milk and sweet.
And for those who worry, no, they don't orphan the babies like they do with cows. It's a share, foals get separated for the twice daily milking only. Moms eat really well, too.
Drafts and Hafis are the breed of choice, "my" guy used Welsh Ponies, he was breeding them anyway.
Milk is used for cosmetics and food, for allergic people. It's quite expensive.
Back to topic.....