I think it depends on where you work, what your position is & what your dress code is. I work in the City and am a legal secretary. Our dress code is business casual, so on most days I'm in a long skirt, tank & jacket (kinda "boho chic"!). I've carried both my Baca and my Setela bags to work. The Setela is nice cuz it's big, soft & slouchy and can hold a lot.
When I go to work, I almost always carry a tote bag in addition to my handbag - I use it for carrying my shoes, an umbrella, my dinner/snack, a light jacket/sweater, and papers, folders and other things I need for work. There were some days when I carried my Setela that I didn't need my tote. There's so much room in that bag and it's so easy to carry - it fits nicely on your shoulder too. If I didn't need to bring a change in shoes, I left my tote at home somedays when I used my Setela.
The Baca is an ideal bag for work. Since I almost always carry a tote in addition to my handbag, it was nice having a little bit smaller handbag that didn't add so much weight. Since it is the "bottomless" bag, however, it fit a lot more than other bags its size. Esp if you got it in black, I think the Baca would be totally appropriate for work.
Again, I think it all depends on what you do, where you work and how you dress.