This is the second pair of Merrell's like this that I've purchased. I have a black pair too. They are so comfortable from the first time you wear them! I heard about them from Dr. Oz - he wears them on his show. I've had the black pair for a few years and they still feel great, so I thought I really should buy another pair (or two) so I have more options!
The sizing runs pretty true. I wear a 8.5-9 and got a 9 in the regular width. I sometimes go with a wider width but these are flexible enough that I didn't have to do that on either pair. They fit snug but not tight and I never feel like my feet will slip out of them. My favorite footwear by far!