I’ve got around a dozen outfits from them and can’t fault either the style or the quality. Indeed they are far superior to a lot of the “cottage industry” stuff available on Etsy or eBay and also a lot of the Chinese stuff you get bombarded with on Amazon. I’ve never had a loose thread, to answer one specific question.
They can take a little time to come (around a month), but I wouldn’t worry. I’m a little surprised that they haven’t responded to an email though, might be worth sending a follow up.
Their payment system shows they are linked to bbtsissycloset, which is another serious rabbit hole you can easily go down if you have the money. I’ve got a few dresses from there too, and the quality is equally high, and the dresses to die for.
My only complaint with both sites is that they don’t remove styles no longer available and they stay there for years. So if something is shown as out of stock, don’t bother waiting for it to become available, as in my experience it won’t!