We first tried their chocolates while on a trip to Paris. They are gorgeous.
More recently we've enjoyed hot chocolate from their Plaza Hotel location. While expensive, it is the second best hot chocolate I have ever had and by far the best in NYC. If you are willing to splurge a little (I tend to go for quality over quantity) then perhaps some chocolates from La Maison Du Chocolate are in order.
They have multiple locations worldwide, with a few in NYC. If you cannot make it to a boutique, they ship US wide through their website.