I use the word remarkable a lot when describing winning products.
I abide by the definition of remarkable as coined by Seth Godin.
"Remarkable, literally means, worth making a remark about. A product with the marketing built in. A product that customers enthusiastically talk about to others. A product that literally sells itself."
Remarkable, however is not enough. A winning product must also be relevant. After all, a motorized rocking chair may indeed by remarkable but it is not very relevant, is it?
As defined by Tim Manners, relevant means "solving problems and making people's lives better ... giving happiness ... it's about their everyday life, not just your product."
When your product is both relevant and remarkable, your customers not only become loyal, they become a spokesperson.
O.D.O.o.O.D.B.