The pattern calls for worsted and I used chunky which affected my gauge: I didn't knit as much as I thought I needed to. This was great because I ran out of yarn and was able to finish it off without that extra.
Ran out of yarn? Doesn't Chunky Marble have like a crazy amount in a ball? Yes. But I used it for another project, which is sitting in "need to add ribbon and take a picture" land. Knitting is completed for that project. Since I spread my yarn over 2 projects, I found I had just enough.