I've heard of these sights, as if they've just been sort of in my peripheral online view, but haven't known anyone who uses them, so it is good to know they are legit and work. I'm in the US part of the year, though not at Christmas. But, each year I've been doing less and less 'shopping' at Christmas and more just experiencing the season.

These are good sights to now in general, however, as I even order groceries online sometimes.