I had a grained leather one briefly but now have the classic boxcalf one in mink.
Assuming you're eyeing the grained one, my personal opinion would be
Pros:
1. Aesthetics of course, as low key as
Loewe is, I like how the barcelona is even more low key and unrecognizable
2. Two strap options
3. Very roomy, i was surprised that my small water bottle fit in there, haven't tried a kindle as i dont own one but apparently kindles could fit in there too
4. Back pocket that comes in handy
5. Quite light for a full leather bag of this size
6. Hardy grained leather, should hide any scratches very well assuming it's not bashed or dragged against any brick walls
Cons:
1. Maybe it was just my bag in particular, the leather didn't feel particularly luxurious to me imo.
2. Suede lining, always a con to me for the higher maintenance, but could be a pro to others depending on your view
3. The proportions of the straps look a little odd to me, the chain being too thin for a bag of this size, and the leather strap being a tad too wide, slipping off shoulders easily
4. The new models have a magnet behind the triangle closure, i didnt have that bag for a very long time, but i cant help but feel that over time there might be stretching, wear and tear etc on the thin, delicate dongle connecting the triangle piece to the bag, due to excessive force when pulling it to open the bag
5. The back pocket, whilst handy, doesn't fully span across the back of the bag in the grained version unlike the smooth calf version (check out the pictures on the website) making it much less useful if you intend to put your phone in there
6. This could just be a fluke, but my bag had pretty severe glue stains on the bottom, as well as other minor imperfections such as tiny holes in the glazing, as well as random tiny rogue bits of glazing on the leather itself (mine was a light colour therefore especially obvious) which surprised me as I purchased from a boutique itself, so no chance of it being a fake, I would highly recommend you inspect your bag carefully once you receive it
All in all still a great bag as those are just flaws to me but might not be a bother to anyone else
hope this helps