I just returned from a long international trip bouncing between four different countries and this bag was my side kick during the whole trip. It is light weight and I love both the interchangeable shells. I did wipe down the leather shell with leather milk a few times to build up a patina and protect it. I would wear the bag crossbody while going through airports and walking in the cities and would shorten it when sitting down at restaurants. I like a shoulder bag for everyday use and the strap at its shortest works well for me as a shoulder bag. The adjustable strap is very easy to adjust and I would do it while walking sometimes. The leather shell did patina as it rubbed against my body while moving around. I am ok with that and like the look. One of the added benefits of the shell is that I would use that as another compartment. I kept my kindle and my boarding passes or city maps in the snapped space between the shell and the body. That worked out great! This is a fantastic bag that truly proved itself on this latest trip!