After the disaster that is Carousel (particularly on iOS), I am extremely reluctant to use any other dropbox apps.
Carousel has had major bugs in their iOS client that have not been fixed in nearly a year. I'm talking core features, like background upload of photos not working, which could have led to the loss of priceless photos of my kids, had I not been more vigilant before taking my phone in for service.
Its a fair bet that a goodly number of dropbox customers have lost photos due to this bug. No fix in sight.