Constantly and often use multiple bags in a single day depending upon what I am doing. I use my b30 almost every day. I have some LV bags for different tasks. A neverfull for travel, (much as I get sick of seeing this bag everywhere very few bags beat its functionality), a delightful that i take to tennis courts (sometimes I take my B but only if I am practicing with my husband...I dont trust others to not spray sunblock on it and I dont want to make people uncomfortable) I have another LV with zippers that I carry when I dont really want to take a B and I have yet another small crossbody LV I take for neighborhood chores. I will probably get an Evelyne for that purpose at some point or a C. I am not using my K at all. It is beautiful but it is just not working for me. My B35s I use more on the weekends but I may start using more for work if I can find a lighter laptop sleeve with a strap.