I've recently bought a bottle from them, and it arrived in pristine condition, packed very safely, in just four days.
I think their selection is great, compared with my options here (bear in mind that Binny's can't ship to me), and I wouldn't hesitate to recommend them.
Yes, their shipping costs are a bit higher than, say, Royal Mile. Buying multiple bottles from them seems to make the shipping cost more "worth it," and in the future I may purchase multiple bottles when I buy with them in order to justify the shipping.
So, I'd say, proceed without fear!