I like the look. As Jock Scot said, though, it can start to look strange if the pattern is too large, since it's such a repetitive pattern. It can be like one of those optical illusion puzzle thingies that dazzles the eye and comes off as bizarre.

But conversely, if the pattern is too small, it will "wash out" and look grey from a distance. In fact, regardless of the size, they will all do that. The trick is to find the size that washes out at a far enough distance that people can still see the pattern when they're within, say, speaking distance of you. I think the examples Sandy posted above are just about right.