I went back and forth a lot before actually pulling the trigger on buying these.  I am so glad that I did!  These shoes are very comfortable, they're light-weight but have good support for cross country events.  I was a bit afraid they might slip off my feet in heavy mud but they didn't.  The grip in wet, muddy conditions is exceptional.  My only other advice is to not use them on the road at all... you'll wear out the tread and they are not as comfortable or stable on pavement (of course, they're not meant for that anyway).

I ordered the size shoe I normally wear and, at first, thought they were too snug.  Then, I realized that is what I wanted... snug without being tight.  I use a very thin sock and they are perfect.