Just back from my latest Rick Steves tour, the 14 day Adriatic. I purchased the Ravenna Rolling Bag after using the RS Rolling Backpack for the last three years. I thought it'd be great to have the hard edges on my suitcase. Well, after my first reservations, I have to say I love this bag. I use four packing cubes for my stuff and the Ravenna seemed kinda small. But I unzipped the expandable section increasing the size of the bag for my first zip up. Then I zipped down the expandable portion and, voila, it was perfect! I am a light packer, but not a minimalist. My bag usually weighs between 22-25 lbs. I could go lighter, but I have my list and I'm happy it. There are lots of nooks and crannies in this bag that you can use or not use. I checked my bag on my return flight (had a bottle of olive oil and schnapps) and I felt that the hard shell edges protected my bag a little more than when I checked the Rolling Backpack.
So, if you're on the fence about this bag, I think you'll really like it!