Certainly a beautiful boat and also an extreme boat regarding several counts:
A 60ft day sailor, very narrow with a small long interior, a big draft and a nice narrow deep bulbed keel.
This is a sailboat that will need a relatively small sail area relatively to its length, a boat that will take advantage of a big LOA and relatively big LWL to be a fast boat, particularly upwind. The narrow hull will not generate a lot of form stability, it is a boat that needs to heel to create RM. With any considerable amount of wind this boat will go fast upwind but with a lot of heel.
I understand and respect the intention to make the boat accordingly with semiotic image of a past traditional model, a long canoe body. That gives a beautiful boat but that double end takes away the possibility of increasing that already small for stability, particularly downwind.
Here you have another American very marrow boat, certainly more sportive, using a shape of hull and transom that will provide more form stability:
But the Silver is a very particular boat certainly for a very particular owner to whom maximizing performance will not be central, neither the interior space in what regards pleasantness or space volume or the possibility to sail in not deep waters. Probably beauty, pleasure of sailing and easy speed are what the owner wants and I have no doubt the boat will provide that.
Anyway, talking about an one off is completely different than talking about a production model. A production model is made to please to a market segment, a one off is made to please a owner. If the owner is completely satisfied and his dreams were fulfilled, than it is a great boat even if it will not please or satisfy the needs of any other sailor. Regarding a production model, it is more complicated since the designer is not trying to satisfy only one client but the needs and desires of many people.