Pros : This seems to be the perfect-sized H came to use with the "Hobby U came" Aside from looking great, this lead is easy on the fingers (I play the harp and can't have sore fingers) and gracefully forms to every curve.
Cons : I can't think of a single con.
Other Thoughts : I appreciate that Delphi sells its lead in coils. This saves a lot of packaging fees and makes it easy to store.