There are reviews of the Rick Steves Appenzell on eBags and Amazon. Probably other places as well. While the bag does indeed work for me, I hope you read the reviews first ...
I'm a fairly average-sized female - 5'5". Semi-fit.
The Appenzell is considered a "day bag", rather than a real full-sized back pack.
It used to be possible to find Rick Steves luggage on other general sites, but he seems to have pulled back to just his own web site now. At least the products are no longer on several I just checked, and I'd also looked some time ago and found the same thing.
I do also use the bag for more general travel. I only resort to the roller bag when I need to look slightly more respectable than a back-packing grandmother.
There is a good discussion on the merits of various light weight bags
HERE. Some of the other posters took me to task for my bag not having the hip belt, and made good arguments. Worth reading, IMHO.
Romelle