K.P.
My daughter has gone to the Bothell Bright Horizons since she was a baby (she's five now), and we've had a very good experience. My little niece (almost two) also goes there now.
We've found the staff to be friendly and caring. They all seem to know all the kids. It's clean, and there are plenty of toys in good working order. They also have fun activities (and good curriculum in preschool) for the kids.
I agree with the poster that says to visit and hang out there for a while with your child to see what you think.