I've owned both the 30 and the 25. I found the 30 to be much larger than the 25, and the opening is correspondingly smaller on the 25. But I have no trouble fitting all of my belongings in the 25. I like the 25 much better than the 30 for cross body wear, as it doesn't stick out as much. The small zippered top opening on the 25 took a while to get used to, but over time it became less of an issue. I now have the azur speedy 25, and really love it. I prefer the monogram straps over the ebene straps, as they get so soft and are much more comfortable.